Fix unique constraints and column nullability (#1348)

This pull request tries to fix the unique constraints and column nullability in the codebase.

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "langflow"
-version = "0.6.5a6"
+version = "0.6.5a7"
 description = "A Python package with a built-in web application"
 authors = ["Logspace <contact@logspace.ai>"]
 maintainers = [

src/backend/langflow/alembic/versions/006b3990db50_add_unique_constraints.py

@@ -27,7 +27,8 @@ def upgrade() -> None:
 
         with op.batch_alter_table('user', schema=None) as batch_op:
             batch_op.create_unique_constraint('uq_user_id', ['id'])
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     # ### end Alembic commands ###
@@ -44,6 +45,7 @@ def downgrade() -> None:
 
         with op.batch_alter_table('apikey', schema=None) as batch_op:
             batch_op.drop_constraint('uq_apikey_id', type_='unique')
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
     # ### end Alembic commands ###

src/backend/langflow/alembic/versions/2ac71eb9c3ae_adds_credential_table.py

@@ -29,9 +29,10 @@ def upgrade() -> None:
         sa.Column('id', sqlmodel.sql.sqltypes.GUID(), nullable=False),
         sa.Column('created_at', sa.DateTime(), nullable=False),
         sa.Column('updated_at', sa.DateTime(), nullable=True),
-        sa.PrimaryKeyConstraint('id', name=op.f('pk_credential')),
+        sa.PrimaryKeyConstraint('id'),
         )
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
     # ### end Alembic commands ###
 
@@ -40,6 +41,7 @@ def downgrade() -> None:
     # ### commands auto generated by Alembic - please adjust! ###
     try:
         op.drop_table('credential')
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
     # ### end Alembic commands ###

src/backend/langflow/alembic/versions/7843803a87b5_store_updates.py

@@ -45,6 +45,7 @@ def downgrade() -> None:
 
         with op.batch_alter_table("flow", schema=None) as batch_op:
             batch_op.drop_column("is_component")
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
     # ### end Alembic commands ###

src/backend/langflow/alembic/versions/7d2162acc8b2_adds_updated_at_and_folder_cols.py

@@ -37,7 +37,6 @@ def upgrade() -> None:
     with op.batch_alter_table('flow', schema=None) as batch_op:
         batch_op.add_column(sa.Column('updated_at', sa.DateTime(), nullable=True))
         batch_op.add_column(sa.Column('folder', sqlmodel.sql.sqltypes.AutoString(), nullable=True))
-
     # ### end Alembic commands ###
 
 
@@ -67,8 +66,8 @@ def downgrade() -> None:
         sa.Column('flow_id', sa.CHAR(length=32), nullable=True),
         sa.Column('id', sa.CHAR(length=32), nullable=False),
         sa.ForeignKeyConstraint(['flow_id'], ['flow.id'], ),
-        sa.PrimaryKeyConstraint('id', name=op.f('pk_flowstyle'))
+        sa.PrimaryKeyConstraint('id'),
-        sa.UniqueConstraint('id', name=op.f('uq_flowstyle_id'))
+        sa.UniqueConstraint('id')
         )
         op.create_table('component',
         sa.Column('id', sa.CHAR(length=32), nullable=False),
@@ -81,7 +80,7 @@ def downgrade() -> None:
         sa.Column('is_read_only', sa.BOOLEAN(), nullable=False),
         sa.Column('create_at', sa.DATETIME(), nullable=False),
         sa.Column('update_at', sa.DATETIME(), nullable=False),
-        sa.PrimaryKeyConstraint('id', name=op.f('pk_component'))
+        sa.PrimaryKeyConstraint('id')
         )
 
         with op.batch_alter_table('component', schema=None) as batch_op:

src/backend/langflow/alembic/versions/eb5866d51fd2_change_columns_to_be_nullable.py

@@ -29,7 +29,8 @@ def upgrade() -> None:
     except exc.SQLAlchemyError:
         # connection.execute(text("ROLLBACK"))
         pass
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     try:
@@ -37,7 +38,8 @@ def upgrade() -> None:
     except exc.SQLAlchemyError:
         # connection.execute(text("ROLLBACK"))
         pass
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
     # ### end Alembic commands ###
 
@@ -64,7 +66,8 @@ def downgrade() -> None:
             batch_op.create_index(
                 "ix_component_frontend_node_id", ["frontend_node_id"], unique=False
             )
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     try:
@@ -81,6 +84,7 @@ def downgrade() -> None:
             sa.PrimaryKeyConstraint("id", name="pk_flowstyle"),
             sa.UniqueConstraint("id", name="uq_flowstyle_id"),
         )
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
     # ### end Alembic commands ###

src/backend/langflow/alembic/versions/f5ee9749d1a6_user_id_can_be_null_in_flow.py

@@ -7,10 +7,8 @@ Create Date: 2023-10-18 23:12:27.297016
 """
 from typing import Sequence, Union
 
-from alembic import op
 import sqlalchemy as sa
-import sqlmodel
+from alembic import op
-
 
 # revision identifiers, used by Alembic.
 revision: str = "f5ee9749d1a6"
@@ -26,7 +24,8 @@ def upgrade() -> None:
             batch_op.alter_column(
                 "user_id", existing_type=sa.CHAR(length=32), nullable=True
             )
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     # ### end Alembic commands ###
@@ -39,7 +38,8 @@ def downgrade() -> None:
             batch_op.alter_column(
                 "user_id", existing_type=sa.CHAR(length=32), nullable=False
             )
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     # ### end Alembic commands ###

src/backend/langflow/alembic/versions/fd531f8868b1_fix_credential_table.py

@@ -21,7 +21,8 @@ def upgrade() -> None:
     try:
         with op.batch_alter_table('credential', schema=None) as batch_op:
             batch_op.create_foreign_key("fk_credential_user_id", 'user', ['user_id'], ['id'])
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     # ### end Alembic commands ###
@@ -32,7 +33,8 @@ def downgrade() -> None:
     try:
         with op.batch_alter_table('credential', schema=None) as batch_op:
             batch_op.drop_constraint("fk_credential_user_id", type_='foreignkey')
-    except Exception:
+    except Exception as e:
+        print(e)
         pass
 
     # ### end Alembic commands ###