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refactor(migrations): merge channels FR #1196 migrations into single 0037
Consolidates 0037_channeloverride_and_user_hidden, 0038_backfill_auto_created_by_null, 0039_channelgroupm3uaccount_auto_sync_channel_end, and 0040_channel_channel_number_nullable into a single 0037_auto_sync_overhaul migration. The merged migration runs operations in dependency-respecting order: 1. AddField Channel.user_hidden 2. CreateModel ChannelOverride 3. AddField ChannelGroupM3UAccount.auto_sync_channel_end 4. RunPython backfill_auto_created_by_null 5. AlterField Channel.channel_number (nullable) 6. RunPython noop / reverse_backfill_channel_number_nulls Also, update CHANGELOG.md and update migration references in test
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7 changed files with 165 additions and 202 deletions
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@ -27,7 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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### Added
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- **Auto-sync overhaul (FR #1196)**: comprehensive rebuild of the M3U auto-channel-sync flow. Introduces a per-field override system, hide-from-output flag, range-bounded auto-numbering with a re-pack helper, multi-stream channel safety, multi-provider shared-range merging, and an across-the-board move from per-row writes to bulk operations. Migrations included: `apps/channels/0037_channeloverride_and_user_hidden`, `0038_backfill_auto_created_by_null`, `0039_channelgroupm3uaccount_auto_sync_channel_end`, `0040_channel_channel_number_nullable`, and `apps/m3u/0020_m3uaccount_auto_cleanup_unused_channels`. (Closes #1196)
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- **Auto-sync overhaul (FR #1196)**: comprehensive rebuild of the M3U auto-channel-sync flow. Introduces a per-field override system, hide-from-output flag, range-bounded auto-numbering with a re-pack helper, multi-stream channel safety, multi-provider shared-range merging, and an across-the-board move from per-row writes to bulk operations. Migrations included: `apps/channels/0037_auto_sync_overhaul` (bundled CreateModel + AddField + AlterField + RunPython operations) and `apps/m3u/0020_m3uaccount_auto_cleanup_unused_channels`. (Closes #1196)
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- **Per-field channel overrides for auto-synced channels.** A new `ChannelOverride` table (one-to-one with `Channel`) holds user-specified values for `name`, `channel_number`, `channel_group`, `logo`, `tvg_id`, `tvc_guide_stationid`, `epg_data`, and `stream_profile`. Sync writes only to `Channel.*` columns; the override row takes precedence at read time via a new `with_effective_values()` queryset helper that coalesces both sources at the SQL layer. Every output surface that consumes channel data reads through this helper so overrides surface consistently: HDHR (`/hdhr/lineup.json` and per-profile variants, `/hdhr/discover.json`), M3U (`/output/m3u`, per-profile variants), EPG (`/output/epg`, per-profile variants), XC API (`get_live_streams`, `xmltv.php`), the channels list/detail endpoints, and the TV Guide summary endpoint (`GET /api/channels/channels/summary/`). Channel API responses now include both the raw `name`/`channel_number`/etc. fields AND new `effective_*` annotations plus the `override` object, so frontend consumers can show both "what the user picked" and "what the provider sent" simultaneously.
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- **Per-field reset-to-provider icon.** FK pickers (channel group, logo, EPG, stream profile) and scalar inputs (name, channel_number, tvg_id, tvc_guide_stationid) display a small reset icon ("Provider: <value>" subtext + Undo2 button) when the field has an active override on an auto-synced channel. Clicking it sets the form value back to the provider value; the override for that field is cleared on save while other overrides remain intact.
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- **Auto-created channel source attribution.** The channel edit form shows an "Auto-created from: <provider name> / <stream name>" label at the top of auto-synced channels so the user can see which M3U account and which stream produced the row.
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@ -101,7 +101,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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### Changed
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- **`Channel.channel_number` is now nullable.** Auto-sync may produce channels without an assigned number (for example, a sync run where the configured range was exhausted before this stream could be slotted, or a hidden channel in compact mode whose slot was released for visible channels). Existing channels are unchanged. HDHR / M3U / EPG / XC output endpoints filter out channels with `null` channel_number, so a number-less row is invisible to clients but visible in the channels page where the user can assign one. Migration `0040_channel_channel_number_nullable` includes a reverse-direction backfill so a rollback that re-imposes NOT NULL still succeeds even if NULLs are present.
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- **`Channel.channel_number` is now nullable.** Auto-sync may produce channels without an assigned number (for example, a sync run where the configured range was exhausted before this stream could be slotted, or a hidden channel in compact mode whose slot was released for visible channels). Existing channels are unchanged. HDHR / M3U / EPG / XC output endpoints filter out channels with `null` channel_number, so a number-less row is invisible to clients but visible in the channels page where the user can assign one. The 0037 auto-sync overhaul migration includes a reverse-direction backfill on the `channel_number` AlterField step so a rollback that re-imposes NOT NULL still succeeds even if NULLs are present.
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- **M3U account delete always cascades auto-created channels.** The delete dialog is a single confirmation showing the count of affected channels (fetched from the new auto-created-channels-count endpoint). Auto-created channels are removed regardless of `user_hidden` or override state: override rows cascade via the one-to-one FK; hidden status does not preserve the channel because there is no provider left to populate it on the next sync. Manual channels are unaffected; their non-provider streams remain intact, and only streams owned by the deleted account are removed. The destroy response now returns `{"deleted_channels": N}` (HTTP 200) instead of an empty 204 so the confirmation toast can show the actual count.
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- **Bulk channel edit auto-routes auto-created channels through the override path.** When a bulk edit includes auto-synced channels, the changed fields are written to each channel's `ChannelOverride` row instead of the raw `Channel.*` columns, so the edit survives the next sync. Manual channels in the same selection write directly to `Channel.*`. A "Clear all overrides" affordance pre-clears overrides on the selection before applying new edits in the same submit (clear runs before the routing PATCH so a same-submit clear cannot wipe just-written overrides).
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- **Inline edits on the channels table route through the override row for auto-synced channels.** Editing a cell directly in the table (number, name, group, EPG, logo) now writes to `ChannelOverride.<field>` for auto-synced rows so the edit survives the next refresh; manual rows continue to write directly. The save mechanic and validation are unchanged from the user's perspective.
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156
apps/channels/migrations/0037_auto_sync_overhaul.py
Normal file
156
apps/channels/migrations/0037_auto_sync_overhaul.py
Normal file
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@ -0,0 +1,156 @@
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"""
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Auto-sync overhaul (FR #1196): per-field channel overrides, hide-from-output
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flag, configurable auto-sync number range, and nullable channel_number for
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compact-numbering slot release.
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Bundled operations (in forward order; reversed on rollback):
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1. AddField Channel.user_hidden
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2. CreateModel ChannelOverride (one-to-one Channel)
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3. AddField ChannelGroupM3UAccount.auto_sync_channel_end
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4. RunPython backfill_auto_created_by_null (orphan re-attribution / demotion)
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5. AlterField Channel.channel_number (nullable)
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6. RunPython noop / reverse_backfill_channel_number_nulls
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(rollback-safety hook; runs FIRST on un-apply, fills NULLs
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so step 5 reverse can re-impose NOT NULL)
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"""
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import django.db.models.deletion
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from django.db import migrations, models
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from django.db.models import Max
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def backfill_auto_created_by_null(apps, schema_editor):
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"""
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Re-attribute or demote `auto_created=True, auto_created_by=NULL` rows.
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Sync only touches rows where `auto_created_by=account`, so orphans
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accumulate indefinitely. Best-effort re-attribute via the channel's
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streams' single owning account; otherwise demote to manual by clearing
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`auto_created`. The channel and any user customization survive; sync
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will not touch a demoted row again.
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"""
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Channel = apps.get_model("dispatcharr_channels", "Channel")
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ChannelStream = apps.get_model("dispatcharr_channels", "ChannelStream")
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orphans = Channel.objects.filter(auto_created=True, auto_created_by__isnull=True)
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total = orphans.count()
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if total == 0:
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return
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print(f"\n Found {total} auto_created channels with NULL auto_created_by")
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reattributed = 0
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demoted = 0
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for channel in orphans.iterator(chunk_size=200):
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account_ids = set(
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ChannelStream.objects.filter(channel=channel)
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.values_list("stream__m3u_account_id", flat=True)
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)
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account_ids.discard(None)
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if len(account_ids) == 1:
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channel.auto_created_by_id = next(iter(account_ids))
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channel.save(update_fields=["auto_created_by"])
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reattributed += 1
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else:
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channel.auto_created = False
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channel.save(update_fields=["auto_created"])
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demoted += 1
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print(
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f" Re-attributed: {reattributed}, demoted to manual "
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f"(ambiguous/no streams): {demoted}"
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)
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def reverse_auto_created_by_null(apps, schema_editor):
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# Forward decisions cannot be cleanly reverted (no record of the
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# original NULL state). Leaving the re-attributions and demotions in
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# place is safer than restoring NULLs the schema may not accept.
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pass
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def noop(apps, schema_editor):
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pass
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def reverse_backfill_channel_number_nulls(apps, schema_editor):
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"""
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Rollback-safety hook for the channel_number nullable AlterField.
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Runs FIRST on un-apply (operations reverse in list order) and assigns
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sequential channel numbers above the current max to any NULL rows so
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the AlterField reverse (nullable to NOT NULL) succeeds without a
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constraint violation. The user can re-hide or re-number these
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channels after they have rolled back.
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"""
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Channel = apps.get_model("dispatcharr_channels", "Channel")
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null_qs = Channel.objects.filter(channel_number__isnull=True)
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null_count = null_qs.count()
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if null_count == 0:
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return
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max_num = Channel.objects.aggregate(m=Max("channel_number"))["m"] or 0.0
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next_num = float(max_num) + 1.0
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print(
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f"\n Backfilling channel_number on {null_count} NULL row(s) "
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f"starting at {int(next_num)} so rollback can re-impose NOT NULL"
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)
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for ch in null_qs.order_by("id"):
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ch.channel_number = next_num
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ch.save(update_fields=["channel_number"])
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next_num += 1.0
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class Migration(migrations.Migration):
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dependencies = [
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('core', '022_default_user_limit_settings'),
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('dispatcharr_channels', '0036_alter_stream_name'),
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('epg', '0022_alter_epgdata_name'),
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]
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operations = [
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migrations.AddField(
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model_name='channel',
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name='user_hidden',
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field=models.BooleanField(
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db_index=True,
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default=False,
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help_text='Exclude this channel from downstream client output (HDHR, M3U, EPG, XC). Auto-sync still updates provider metadata.',
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),
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),
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migrations.CreateModel(
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name='ChannelOverride',
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fields=[
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('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
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('name', models.CharField(blank=True, max_length=512, null=True)),
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('channel_number', models.FloatField(blank=True, null=True)),
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('tvg_id', models.CharField(blank=True, max_length=255, null=True)),
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('tvc_guide_stationid', models.CharField(blank=True, max_length=255, null=True)),
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('created_at', models.DateTimeField(auto_now_add=True)),
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('updated_at', models.DateTimeField(auto_now=True)),
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('channel', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='override', to='dispatcharr_channels.channel')),
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('channel_group', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='dispatcharr_channels.channelgroup')),
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('epg_data', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='epg.epgdata')),
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('logo', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='dispatcharr_channels.logo')),
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('stream_profile', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='core.streamprofile')),
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],
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),
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migrations.AddField(
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model_name='channelgroupm3uaccount',
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name='auto_sync_channel_end',
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field=models.FloatField(
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blank=True,
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help_text='Optional upper bound for auto-created channel numbers in this group. Leave blank for unlimited fill. Overflow streams are skipped and reported in the completion notification.',
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null=True,
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),
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),
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migrations.RunPython(backfill_auto_created_by_null, reverse_auto_created_by_null),
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migrations.AlterField(
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model_name='channel',
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name='channel_number',
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field=models.FloatField(blank=True, db_index=True, null=True),
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),
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migrations.RunPython(noop, reverse_backfill_channel_number_nulls),
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]
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@ -1,40 +0,0 @@
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import django.db.models.deletion
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from django.db import migrations, models
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class Migration(migrations.Migration):
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dependencies = [
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('core', '022_default_user_limit_settings'),
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('dispatcharr_channels', '0036_alter_stream_name'),
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('epg', '0022_alter_epgdata_name'),
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]
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operations = [
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migrations.AddField(
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model_name='channel',
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name='user_hidden',
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field=models.BooleanField(
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db_index=True,
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default=False,
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help_text='Exclude this channel from downstream client output (HDHR, M3U, EPG, XC). Auto-sync still updates provider metadata.',
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),
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),
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migrations.CreateModel(
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name='ChannelOverride',
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fields=[
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('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
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('name', models.CharField(blank=True, max_length=512, null=True)),
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('channel_number', models.FloatField(blank=True, null=True)),
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('tvg_id', models.CharField(blank=True, max_length=255, null=True)),
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('tvc_guide_stationid', models.CharField(blank=True, max_length=255, null=True)),
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('created_at', models.DateTimeField(auto_now_add=True)),
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('updated_at', models.DateTimeField(auto_now=True)),
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('channel', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='override', to='dispatcharr_channels.channel')),
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('channel_group', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='dispatcharr_channels.channelgroup')),
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('epg_data', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='epg.epgdata')),
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('logo', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='dispatcharr_channels.logo')),
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('stream_profile', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='core.streamprofile')),
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],
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),
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]
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@ -1,71 +0,0 @@
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"""
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Data migration: re-attribute `auto_created=True, auto_created_by=NULL` channels
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or demote them to manual.
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Sync logic only touches rows where `auto_created_by=account`, so orphaned
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rows accumulate indefinitely and clutter the admin table.
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Strategy:
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1. Best-effort re-attribute: if the channel's streams all live under a
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single M3U account, set `auto_created_by` to that account.
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2. Otherwise (zero streams or multiple accounts), demote to manual by
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clearing `auto_created`. The channel and any user customization survive;
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sync will not touch it again.
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Each decision is logged so operators can see the outcome at migrate time.
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"""
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from django.db import migrations
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def backfill(apps, schema_editor):
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Channel = apps.get_model("dispatcharr_channels", "Channel")
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ChannelStream = apps.get_model("dispatcharr_channels", "ChannelStream")
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orphans = Channel.objects.filter(auto_created=True, auto_created_by__isnull=True)
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total = orphans.count()
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if total == 0:
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return
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print(f"\n Found {total} auto_created channels with NULL auto_created_by")
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reattributed = 0
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demoted = 0
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for channel in orphans.iterator(chunk_size=200):
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account_ids = set(
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ChannelStream.objects.filter(channel=channel)
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.values_list("stream__m3u_account_id", flat=True)
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)
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account_ids.discard(None)
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if len(account_ids) == 1:
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channel.auto_created_by_id = next(iter(account_ids))
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channel.save(update_fields=["auto_created_by"])
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reattributed += 1
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else:
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channel.auto_created = False
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channel.save(update_fields=["auto_created"])
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demoted += 1
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print(
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f" Re-attributed: {reattributed}, demoted to manual "
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f"(ambiguous/no streams): {demoted}"
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)
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def reverse(apps, schema_editor):
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# Irreversible data fix - leaving the forward decisions in place is
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# safer than trying to re-null the auto_created_by field (we cannot
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# recreate the deleted rows).
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pass
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class Migration(migrations.Migration):
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dependencies = [
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("dispatcharr_channels", "0037_channeloverride_and_user_hidden"),
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]
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operations = [
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migrations.RunPython(backfill, reverse),
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]
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# Generated by Django 6.0.4 on 2026-04-24 02:38
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from django.db import migrations, models
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class Migration(migrations.Migration):
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dependencies = [
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('dispatcharr_channels', '0038_backfill_auto_created_by_null'),
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]
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operations = [
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migrations.AddField(
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model_name='channelgroupm3uaccount',
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name='auto_sync_channel_end',
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field=models.FloatField(blank=True, help_text='Optional upper bound for auto-created channel numbers in this group. Leave blank for unlimited fill. Overflow streams are skipped and reported in the completion notification.', null=True),
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),
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]
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@ -1,64 +0,0 @@
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# Generated for compact-numbering support.
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# Allowing NULL on Channel.channel_number is required so the compact
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# numbering pass can release a hidden channel's slot back to the pool.
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# Existing rows are unaffected (NOT NULL -> NULL is a column-only ALTER).
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#
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# Rollback safety: reverting nullable -> NOT NULL would fail with a
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# constraint violation on any row with NULL channel_number. A pre-revert
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# RunPython step backfills those NULLs with sequential numbers above the
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# current max so the schema can shrink back to NOT NULL cleanly. The
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# operation list is ordered so that on REVERSE, the RunPython runs
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# BEFORE the AlterField (operations reverse in list order on un-apply).
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from django.db import migrations, models
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from django.db.models import Max
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def forward_noop(apps, schema_editor):
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pass
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def reverse_backfill_nulls(apps, schema_editor):
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"""
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Assign sequential channel numbers to rows whose channel_number is NULL,
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so the subsequent reverse AlterField can re-impose NOT NULL.
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Numbers are placed above the current max to avoid collision with any
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other channel's existing assignment. The user can re-hide or re-number
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these channels after they have rolled back.
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"""
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Channel = apps.get_model("dispatcharr_channels", "Channel")
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null_qs = Channel.objects.filter(channel_number__isnull=True)
|
||||
null_count = null_qs.count()
|
||||
if null_count == 0:
|
||||
return
|
||||
|
||||
max_num = Channel.objects.aggregate(m=Max("channel_number"))["m"] or 0.0
|
||||
next_num = float(max_num) + 1.0
|
||||
print(
|
||||
f"\n Backfilling channel_number on {null_count} NULL row(s) "
|
||||
f"starting at {int(next_num)} so rollback can re-impose NOT NULL"
|
||||
)
|
||||
for ch in null_qs.order_by("id"):
|
||||
ch.channel_number = next_num
|
||||
ch.save(update_fields=["channel_number"])
|
||||
next_num += 1.0
|
||||
|
||||
|
||||
class Migration(migrations.Migration):
|
||||
|
||||
dependencies = [
|
||||
("dispatcharr_channels", "0039_channelgroupm3uaccount_auto_sync_channel_end"),
|
||||
]
|
||||
|
||||
operations = [
|
||||
migrations.AlterField(
|
||||
model_name="channel",
|
||||
name="channel_number",
|
||||
field=models.FloatField(blank=True, db_index=True, null=True),
|
||||
),
|
||||
# Forward: no-op (no NULL rows exist before AlterField runs).
|
||||
# Reverse: runs FIRST on un-apply (list-reversed) and clears NULLs
|
||||
# so the AlterField reverse (nullable -> NOT NULL) succeeds.
|
||||
migrations.RunPython(forward_noop, reverse_backfill_nulls),
|
||||
]
|
||||
|
|
@ -1931,15 +1931,15 @@ class EPGDispatchExistingChannelTests(TestCase):
|
|||
|
||||
class Migration0037DemoteOrphansTests(TestCase):
|
||||
"""
|
||||
Migration 0037 originally deleted orphaned `auto_created=True,
|
||||
auto_created_by=NULL` channels. The fix demotes them to
|
||||
`auto_created=False` instead, preserving the channel and any
|
||||
overrides that may exist on it.
|
||||
The 0037 auto-sync overhaul migration's `backfill_auto_created_by_null`
|
||||
step demotes orphaned `auto_created=True, auto_created_by=NULL` channels
|
||||
to `auto_created=False` instead of deleting them, preserving the
|
||||
channel and any overrides that may exist on it.
|
||||
"""
|
||||
|
||||
def test_orphan_with_no_streams_is_demoted_not_deleted(self):
|
||||
# Create an orphaned auto-created channel with no streams. This
|
||||
# is the case that the original migration would silently delete.
|
||||
# is the case that a delete-on-orphan strategy would silently lose.
|
||||
ch = Channel.objects.create(
|
||||
name="OrphanGhost",
|
||||
channel_number=999,
|
||||
|
|
@ -1955,13 +1955,13 @@ class Migration0037DemoteOrphansTests(TestCase):
|
|||
from django.apps import apps as django_apps
|
||||
|
||||
module = import_module(
|
||||
"apps.channels.migrations.0038_backfill_auto_created_by_null"
|
||||
"apps.channels.migrations.0037_auto_sync_overhaul"
|
||||
)
|
||||
|
||||
# The migration function takes (apps, schema_editor); apps is
|
||||
# the historical app registry. For this unit test we call with
|
||||
# the live registry.
|
||||
module.backfill(django_apps, None)
|
||||
module.backfill_auto_created_by_null(django_apps, None)
|
||||
|
||||
ch.refresh_from_db()
|
||||
self.assertFalse(
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue