Always but always but ALWAYS, use server_default=func.now() when setting up a datetime field we autopopulate.

crc/models/task_log.py

@@ -31,7 +31,7 @@ class TaskLogModel(db.Model):
     study_id = db.Column(db.Integer, db.ForeignKey(StudyModel.id), nullable=False)
     workflow_id = db.Column(db.Integer, db.ForeignKey(WorkflowModel.id), nullable=False)
     task = db.Column(db.String)
-    timestamp = db.Column(db.DateTime(timezone=True), default=func.now())
+    timestamp = db.Column(db.DateTime(timezone=True), server_default=func.now())
 
 
 class TaskLogModelSchema(ma.Schema):

migrations/versions/1fb36d682c7f_.py

@@ -0,0 +1,28 @@
+"""empty message
+
+Revision ID: 1fb36d682c7f
+Revises: e8cc6a9245f3
+Create Date: 2022-01-12 12:28:48.577819
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '1fb36d682c7f'
+down_revision = 'e8cc6a9245f3'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('task_log', sa.Column('timestamp', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('task_log', 'timestamp')
+    # ### end Alembic commands ###

migrations/versions/e8cc6a9245f3_.py

@@ -0,0 +1,28 @@
+"""empty message
+
+Revision ID: e8cc6a9245f3
+Revises: efdc41cc7fbf
+Create Date: 2022-01-12 12:28:25.257443
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = 'e8cc6a9245f3'
+down_revision = 'efdc41cc7fbf'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('task_log', 'timestamp')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('task_log', sa.Column('timestamp', postgresql.TIMESTAMP(timezone=True), autoincrement=False, nullable=True))
+    # ### end Alembic commands ###