refactor: remove unused is_deleted field from conversations table

Remove the is_deleted field that was never utilized for soft deletion.
This simplifies queries and reduces unnecessary database overhead.

Fixes #25017

api/controllers/console/app/conversation.py

@@ -343,9 +343,7 @@ class CompletionConversationApi(Resource):
         current_user, _ = current_account_with_tenant()
         args = CompletionConversationQuery.model_validate(request.args.to_dict(flat=True))  # type: ignore
 
-        query = sa.select(Conversation).where(
-            Conversation.app_id == app_model.id, Conversation.mode == "completion", Conversation.is_deleted.is_(False)
-        )
+        query = sa.select(Conversation).where(Conversation.app_id == app_model.id, Conversation.mode == "completion")
 
         if args.keyword:
             from libs.helper import escape_like_pattern
@@ -460,7 +458,7 @@ class ChatConversationApi(Resource):
             .subquery()
         )
 
-        query = sa.select(Conversation).where(Conversation.app_id == app_model.id, Conversation.is_deleted.is_(False))
+        query = sa.select(Conversation).where(Conversation.app_id == app_model.id)
 
         if args.keyword:
             from libs.helper import escape_like_pattern

api/migrations/versions/2025_09_02_2012-4f02b6704509_remove_unused_is_deleted_field_from_.py

@@ -0,0 +1,33 @@
+"""remove unused is_deleted field from conversations
+
+Revision ID: 4f02b6704509
+Revises: b95962a3885c
+Create Date: 2025-09-02 20:12:37.311318
+
+"""
+from alembic import op
+import models as models
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '4f02b6704509'
+down_revision = 'b95962a3885c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('conversations', schema=None) as batch_op:
+        batch_op.drop_column('is_deleted')
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('conversations', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('is_deleted', sa.BOOLEAN(), server_default=sa.text('false'), autoincrement=False, nullable=False))
+
+    # ### end Alembic commands ###

api/models/model.py

@@ -745,8 +745,6 @@ class Conversation(Base):
         "MessageAnnotation", backref="conversation", lazy="select", passive_deletes="all"
     )
 
-    is_deleted: Mapped[bool] = mapped_column(sa.Boolean, nullable=False, server_default=sa.text("false"))
-
     @property
     def inputs(self) -> dict[str, Any]:
         inputs = self._inputs.copy()

api/services/conversation_service.py

@@ -49,7 +49,6 @@ class ConversationService:
             return InfiniteScrollPagination(data=[], limit=limit, has_more=False)
 
         stmt = select(Conversation).where(
-            Conversation.is_deleted == False,
             Conversation.app_id == app_model.id,
             Conversation.from_source == ("api" if isinstance(user, EndUser) else "console"),
             Conversation.from_end_user_id == (user.id if isinstance(user, EndUser) else None),
@@ -168,7 +167,6 @@ class ConversationService:
                 Conversation.from_source == ("api" if isinstance(user, EndUser) else "console"),
                 Conversation.from_end_user_id == (user.id if isinstance(user, EndUser) else None),
                 Conversation.from_account_id == (user.id if isinstance(user, Account) else None),
-                Conversation.is_deleted == False,
             )
             .first()
         )

api/tests/test_containers_integration_tests/services/test_web_conversation_service.py

@@ -149,7 +149,6 @@ class TestWebConversationService:
             from_end_user_id=user.id if isinstance(user, EndUser) else None,
             from_account_id=user.id if isinstance(user, Account) else None,
             dialogue_count=0,
-            is_deleted=False,
         )
 
         from extensions.ext_database import db