Add updated and created at fields for tables

app/accounts/models.py

@@ -129,6 +129,13 @@ class Role(db.Model):
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     display_name = db.Column(db.String, unique=True)
     permissions = db.Column(db.ARRAY(db.String))
+    created_at = db.Column(db.DateTime,
+                           nullable=False,
+                           default=db.func.current_timestamp())
+    modified_at = db.Column(db.DateTime,
+                            nullable=False,
+                            default=db.func.current_timestamp(),
+                            onupdate=db.func.current_timestamp())
 
     def __init__(self, name, permissions):
         self.display_name = str(name)

app/devices/models.py

@@ -225,6 +225,13 @@ class DeviceAssociation(db.Model):
                            primary_key=True)
     access_level = db.Column(db.Integer, db.ForeignKey('access_levels.id'),
                              nullable=False)
+    created_at = db.Column(db.DateTime,
+                           nullable=False,
+                           default=db.func.current_timestamp())
+    modified_at = db.Column(db.DateTime,
+                            nullable=False,
+                            default=db.func.current_timestamp(),
+                            onupdate=db.func.current_timestamp())
 
     access_level_data = db.relationship("AccessLevel",
                                         foreign_keys=[access_level])
@@ -279,6 +286,13 @@ class DeviceType(db.Model):
 
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     name = db.Column(db.String, nullable=False)
+    created_at = db.Column(db.DateTime,
+                           nullable=False,
+                           default=db.func.current_timestamp())
+    modified_at = db.Column(db.DateTime,
+                            nullable=False,
+                            default=db.func.current_timestamp(),
+                            onupdate=db.func.current_timestamp())
 
     def __init__(self, name):
         self.name = name
@@ -333,6 +347,13 @@ class AccessLevel(db.Model):
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     name = db.Column(db.String, nullable=False)
     permissions = db.Column(db.ARRAY(db.String), nullable=False)
+    created_at = db.Column(db.DateTime,
+                           nullable=False,
+                           default=db.func.current_timestamp())
+    modified_at = db.Column(db.DateTime,
+                            nullable=False,
+                            default=db.func.current_timestamp(),
+                            onupdate=db.func.current_timestamp())
 
     def __init__(self, name, permissions=['VIEW_DEVICE']):
         self.name = name

migrations/versions/764de3c39771_.py

@@ -0,0 +1,51 @@
+"""empty message
+
+Revision ID: 764de3c39771
+Revises: 43e5ad1c4393
+Create Date: 2018-11-03 15:00:36.463124
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '764de3c39771'
+down_revision = '43e5ad1c4393'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('access_levels', sa.Column('created_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    op.add_column('access_levels', sa.Column('modified_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    op.add_column('device_associations', sa.Column('created_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    op.add_column('device_associations', sa.Column('modified_at',
+        sa.DateTime(), nullable=False,
+        server_default=sa.func.current_timestamp()))
+    op.add_column('device_types', sa.Column('created_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    op.add_column('device_types', sa.Column('modified_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    op.add_column('roles', sa.Column('created_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    op.add_column('roles', sa.Column('modified_at', sa.DateTime(),
+        nullable=False, server_default=sa.func.current_timestamp()))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('roles', 'modified_at')
+    op.drop_column('roles', 'created_at')
+    op.drop_column('device_types', 'modified_at')
+    op.drop_column('device_types', 'created_at')
+    op.drop_column('device_associations', 'modified_at')
+    op.drop_column('device_associations', 'created_at')
+    op.drop_column('access_levels', 'modified_at')
+    op.drop_column('access_levels', 'created_at')
+    # ### end Alembic commands ###