🔥 chore(alembic): remove FlowStyles table

This commit removes the FlowStyles table from the database. The table was no longer needed and has been dropped. The corresponding indexes and foreign key constraints have also been removed.

Downgrade functionality has been implemented to recreate the FlowStyles table and its associated indexes and foreign key constraints if needed.

src/backend/langflow/alembic/versions/921920b95d3a_remove_flowstyles_table.py

@@ -0,0 +1,63 @@
+"""Remove FlowStyles table
+
+Revision ID: 921920b95d3a
+Revises: 4814b6f4abfd
+Create Date: 2023-08-07 10:22:54.503716
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = "921920b95d3a"
+down_revision: Union[str, None] = "4814b6f4abfd"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index("ix_component_frontend_node_id", table_name="component")
+    op.drop_index("ix_component_name", table_name="component")
+    op.drop_table("component")
+    op.drop_table("flowstyle")
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "flowstyle",
+        sa.Column("color", sa.VARCHAR(), nullable=False),
+        sa.Column("emoji", sa.VARCHAR(), nullable=False),
+        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"),
+        sa.UniqueConstraint("id"),
+    )
+    op.create_table(
+        "component",
+        sa.Column("id", sa.CHAR(length=32), nullable=False),
+        sa.Column("frontend_node_id", sa.CHAR(length=32), nullable=False),
+        sa.Column("name", sa.VARCHAR(), nullable=False),
+        sa.Column("description", sa.VARCHAR(), nullable=True),
+        sa.Column("python_code", sa.VARCHAR(), nullable=True),
+        sa.Column("return_type", sa.VARCHAR(), nullable=True),
+        sa.Column("is_disabled", sa.BOOLEAN(), nullable=False),
+        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"),
+    )
+    op.create_index("ix_component_name", "component", ["name"], unique=False)
+    op.create_index(
+        "ix_component_frontend_node_id", "component", ["frontend_node_id"], unique=False
+    )
+    # ### end Alembic commands ###