makes prefix field optional

Author: devraj

src/labs/alembic/versions/6b3a877ee8e4_drops_required_constraint_of_prefix.py

@@ -0,0 +1,32 @@
+"""drops required constraint of prefix
+
+Revision ID: 6b3a877ee8e4
+Revises: d8fb062b42d6
+Create Date: 2023-04-18 01:24:48.681012
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '6b3a877ee8e4'
+down_revision = 'd8fb062b42d6'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('s3_file_metadata', 'prefix',
+               existing_type=sa.VARCHAR(),
+               nullable=True)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('s3_file_metadata', 'prefix',
+               existing_type=sa.VARCHAR(),
+               nullable=False)
+    # ### end Alembic commands ###

src/labs/models/s3.py

@@ -2,6 +2,7 @@
 
 
 """
+from typing import Optional
 from uuid import uuid4
 from datetime import timedelta
 from typing import Union
@@ -54,8 +55,12 @@ class S3FileMetadata(
 
     __tablename__ = "s3_file_metadata"
 
+    # This is the unique key for this object store in the associated bucket
+    # which is automatically assigned to the metadata, you do not have to
+    # worry about it simply deal with the wrapped methods provided by this class
     s3_key: Mapped[str]
-    prefix: Mapped[str]
+    # Prefix where you want the object to be stored e.g images, files
+    prefix: Mapped[Optional[str]]
 
     file_name: Mapped[str]
     file_size: Mapped[int]