Implement feed entry revision tracking: add field_changes to FeedEntryRevision, enhance create_revision_snapshot function, and update feed entry history display

Author: Xpirix

qgisfeedproject/qgisfeed/migrations/0017_feedentryrevision_field_changes.py

@@ -0,0 +1,21 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("qgisfeed", "0016_qgisfeedentry_reviewers_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="feedentryrevision",
+            name="field_changes",
+            field=models.JSONField(
+                blank=True,
+                default=list,
+                help_text="Structured list of per-field old→new changes",
+                verbose_name="Field Changes",
+            ),
+        ),
+    ]

qgisfeedproject/qgisfeed/migrations/0018_alter_feedentryreview_options.py

@@ -0,0 +1,21 @@
+# Generated by Django 4.2.24 on 2026-03-03 17:08
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("qgisfeed", "0017_feedentryrevision_field_changes"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="feedentryreview",
+            options={
+                "ordering": ["created_at"],
+                "verbose_name": "Feed Entry Review",
+                "verbose_name_plural": "Feed Entry Reviews",
+            },
+        ),
+    ]

qgisfeedproject/qgisfeed/models.py

@@ -424,7 +424,7 @@ class FeedEntryRevision(models.Model):
         get_user_model(), on_delete=models.CASCADE, verbose_name=_("Modified by")
     )
 
-    # Snapshot of changed fields
+    # Snapshot of changed fields (kept for backward-compat / full-text auditing)
     title = models.CharField(_("Title"), max_length=255)
     content = models.TextField(_("Content"))
     url = models.URLField(_("URL"), max_length=200, blank=True, null=True)
@@ -438,6 +438,14 @@ class FeedEntryRevision(models.Model):
         help_text=_("Brief description of what changed"),
     )
 
+    # Per-field diff: list of {"label": ..., "old": ..., "new": ...}
+    field_changes = models.JSONField(
+        _("Field Changes"),
+        default=list,
+        blank=True,
+        help_text=_("Structured list of per-field old→new changes"),
+    )
+
     class Meta:
         ordering = ["-changed_at"]
         verbose_name = _("Feed Entry Revision")