Fix the user avatar URL field length (#4065)

Author: stefannica

src/zenml/zen_stores/migrations/versions/7497d2ff5731_fix_avatar_url_length.py

@@ -0,0 +1,44 @@
+"""fix avatar url length [7497d2ff5731].
+
+Revision ID: 7497d2ff5731
+Revises: 0.90.0
+Create Date: 2025-10-16 16:28:33.729565
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "7497d2ff5731"
+down_revision = "0.90.0"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    """Upgrade database schema and/or data, creating a new revision."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("user", schema=None) as batch_op:
+        batch_op.alter_column(
+            "avatar_url",
+            existing_type=sa.VARCHAR(),
+            type_=sa.TEXT(),
+            existing_nullable=True,
+        )
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade database schema and/or data back to the previous revision."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("user", schema=None) as batch_op:
+        batch_op.alter_column(
+            "avatar_url",
+            existing_type=sa.TEXT(),
+            type_=sa.VARCHAR(),
+            existing_nullable=True,
+        )
+
+    # ### end Alembic commands ###

src/zenml/zen_stores/schemas/user_schemas.py

@@ -78,7 +78,10 @@ class UserSchema(NamedSchema, table=True):
     full_name: str
     description: Optional[str] = Field(sa_column=Column(TEXT, nullable=True))
     email: Optional[str] = Field(nullable=True)
-    avatar_url: Optional[str] = Field(default=None, nullable=True)
+    avatar_url: Optional[str] = Field(
+        default=None,
+        sa_column=Column(TEXT, nullable=True),
+    )
     active: bool
     password: Optional[str] = Field(nullable=True)
     activation_token: Optional[str] = Field(nullable=True)