adding intercted_at column to read_posts table

app/models.py

@@ -617,6 +617,7 @@ user_role = db.Table('user_role',
 read_posts = db.Table('read_posts',
                         db.Column('user_id', db.Integer, db.ForeignKey('user.id'), index=True),
                         db.Column('read_post_id', db.Integer, db.ForeignKey('post.id'), index=True),
+                        db.Column('interacted_at', db.DateTime, index=True, default=utcnow)    # this is when the content is interacte with
                       )
 
 class User(UserMixin, db.Model):

migrations/versions/238d7c60d676_adding_created_at_to_read_posts_table.py

@@ -0,0 +1,34 @@
+"""adding created_at to read_posts table
+
+Revision ID: 238d7c60d676
+Revises: 6e0b98e1fdc6
+Create Date: 2024-09-28 09:26:22.000646
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '238d7c60d676'
+down_revision = '6e0b98e1fdc6'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('read_posts', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('interacted_at', sa.DateTime(), nullable=True))
+        batch_op.create_index(batch_op.f('ix_read_posts_interacted_at'), ['interacted_at'], unique=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('read_posts', schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f('ix_read_posts_interacted_at'))
+        batch_op.drop_column('interacted_at')
+
+    # ### end Alembic commands ###