[WIKI-659] chore: added issue relation and page sort order (#7784)

* chore: added issue relation and page sort order

* feat: add ProjectWebhook model to manage webhooks associated with projects

* chore: updated the migration file

* chore: added migration

* chore: reverted the page base code

* chore: added a variable for sort order in pages

---------

Co-authored-by: pablohashescobar <nikhilschacko@gmail.com>

apps/api/plane/db/migrations/0106_auto_20250912_0845.py

@@ -0,0 +1,152 @@
+# Generated by Django 4.2.22 on 2025-09-12 08:45
+import uuid
+import django
+from django.conf import settings
+from django.db import migrations, models
+
+
+def set_page_sort_order(apps, schema_editor):
+    Page = apps.get_model("db", "Page")
+
+    batch_size = 3000
+    sort_order = 100
+
+    # Get page IDs ordered by name using the historical model
+    # This should include all pages regardless of soft-delete status
+    page_ids = list(Page.objects.all().order_by("name").values_list("id", flat=True))
+
+    updated_pages = []
+    for page_id in page_ids:
+        # Create page instance with minimal data
+        updated_pages.append(Page(id=page_id, sort_order=sort_order))
+        sort_order += 100
+
+        # Bulk update when batch is full
+        if len(updated_pages) >= batch_size:
+            Page.objects.bulk_update(
+                updated_pages, ["sort_order"], batch_size=batch_size
+            )
+            updated_pages = []
+
+    # Update remaining pages
+    if updated_pages:
+        Page.objects.bulk_update(updated_pages, ["sort_order"], batch_size=batch_size)
+
+
+def reverse_set_page_sort_order(apps, schema_editor):
+    Page = apps.get_model("db", "Page")
+    Page.objects.update(sort_order=Page.DEFAULT_SORT_ORDER)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("db", "0105_alter_project_cycle_view_and_more"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ProjectWebhook",
+            fields=[
+                (
+                    "created_at",
+                    models.DateTimeField(auto_now_add=True, verbose_name="Created At"),
+                ),
+                (
+                    "updated_at",
+                    models.DateTimeField(
+                        auto_now=True, verbose_name="Last Modified At"
+                    ),
+                ),
+                (
+                    "deleted_at",
+                    models.DateTimeField(
+                        blank=True, null=True, verbose_name="Deleted At"
+                    ),
+                ),
+                (
+                    "id",
+                    models.UUIDField(
+                        db_index=True,
+                        default=uuid.uuid4,
+                        editable=False,
+                        primary_key=True,
+                        serialize=False,
+                        unique=True,
+                    ),
+                ),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="%(class)s_created_by",
+                        to=settings.AUTH_USER_MODEL,
+                        verbose_name="Created By",
+                    ),
+                ),
+                (
+                    "project",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="project_%(class)s",
+                        to="db.project",
+                    ),
+                ),
+                (
+                    "updated_by",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="%(class)s_updated_by",
+                        to=settings.AUTH_USER_MODEL,
+                        verbose_name="Last Modified By",
+                    ),
+                ),
+                (
+                    "webhook",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="project_webhooks",
+                        to="db.webhook",
+                    ),
+                ),
+                (
+                    "workspace",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="workspace_%(class)s",
+                        to="db.workspace",
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Project Webhook",
+                "verbose_name_plural": "Project Webhooks",
+                "db_table": "project_webhooks",
+                "ordering": ("-created_at",),
+            },
+        ),
+        migrations.AddConstraint(
+            model_name="projectwebhook",
+            constraint=models.UniqueConstraint(
+                condition=models.Q(("deleted_at__isnull", True)),
+                fields=("project", "webhook"),
+                name="project_webhook_unique_project_webhook_when_deleted_at_null",
+            ),
+        ),
+        migrations.AlterUniqueTogether(
+            name="projectwebhook",
+            unique_together={("project", "webhook", "deleted_at")},
+        ),
+        migrations.AlterField(
+            model_name="issuerelation",
+            name="relation_type",
+            field=models.CharField(
+                default="blocked_by", max_length=20, verbose_name="Issue Relation Type"
+            ),
+        ),
+        migrations.RunPython(
+            set_page_sort_order, reverse_code=reverse_set_page_sort_order
+        ),
+    ]

apps/api/plane/db/models/issue.py

@@ -284,6 +284,7 @@ class IssueRelationChoices(models.TextChoices):
     BLOCKED_BY = "blocked_by", "Blocked By"
     START_BEFORE = "start_before", "Start Before"
     FINISH_BEFORE = "finish_before", "Finish Before"
+    IMPLEMENTED_BY = "implemented_by", "Implemented By"
 
 
 class IssueRelation(ProjectBaseModel):
@@ -295,7 +296,6 @@ class IssueRelation(ProjectBaseModel):
     )
     relation_type = models.CharField(
         max_length=20,
-        choices=IssueRelationChoices.choices,
         verbose_name="Issue Relation Type",
         default=IssueRelationChoices.BLOCKED_BY,
     )

apps/api/plane/db/models/page.py

@@ -19,6 +19,7 @@ def get_view_props():
 class Page(BaseModel):
     PRIVATE_ACCESS = 1
     PUBLIC_ACCESS = 0
+    DEFAULT_SORT_ORDER = 65535
 
     ACCESS_CHOICES = ((PRIVATE_ACCESS, "Private"), (PUBLIC_ACCESS, "Public"))
 
@@ -57,7 +58,7 @@ class Page(BaseModel):
     )
     moved_to_page = models.UUIDField(null=True, blank=True)
     moved_to_project = models.UUIDField(null=True, blank=True)
-    sort_order = models.FloatField(default=65535)
+    sort_order = models.FloatField(default=DEFAULT_SORT_ORDER)
 
     external_id = models.CharField(max_length=255, null=True, blank=True)
     external_source = models.CharField(max_length=255, null=True, blank=True)

apps/api/plane/db/models/webhook.py

@@ -7,7 +7,7 @@ from django.db import models
 from django.core.exceptions import ValidationError
 
 # Module imports
-from plane.db.models import BaseModel
+from plane.db.models import BaseModel, ProjectBaseModel
 
 
 def generate_token():
@@ -90,3 +90,24 @@ class WebhookLog(BaseModel):
 
     def __str__(self):
         return f"{self.event_type} {str(self.webhook)}"
+
+
+
+class ProjectWebhook(ProjectBaseModel):
+    webhook = models.ForeignKey(
+        "db.Webhook", on_delete=models.CASCADE, related_name="project_webhooks"
+    )
+
+    class Meta:
+        unique_together = ["project", "webhook", "deleted_at"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["project", "webhook"],
+                condition=models.Q(deleted_at__isnull=True),
+                name="project_webhook_unique_project_webhook_when_deleted_at_null",
+            )
+        ]
+        verbose_name = "Project Webhook"
+        verbose_name_plural = "Project Webhooks"
+        db_table = "project_webhooks"
+        ordering = ("-created_at",)

apps/api/plane/utils/issue_relation_mapper.py

@@ -6,12 +6,14 @@ def get_inverse_relation(relation_type):
         "blocking": "blocked_by",
         "start_before": "start_after",
         "finish_before": "finish_after",
+        "implemented_by": "implements",
+        "implements": "implemented_by",
     }
     return relation_mapping.get(relation_type, relation_type)
 
 
 def get_actual_relation(relation_type):
-    # This function is used to get the actual relation type which is store in database
+    # This function is used to get the actual relation type which is stored in database
     actual_relation = {
         "start_after": "start_before",
         "finish_after": "finish_before",
@@ -19,6 +21,8 @@ def get_actual_relation(relation_type):
         "blocked_by": "blocked_by",
         "start_before": "start_before",
         "finish_before": "finish_before",
+        "implemented_by": "implemented_by",
+        "implements": "implemented_by",
     }
 
     return actual_relation.get(relation_type, relation_type)