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leocrm/alembic/versions/0071_entity_attachments.py
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Python

"""Create entity_attachments table — references DMS files.
Instead of storing files in a separate attachment storage path,
all files go through the DMS (files table) and entity_attachments
just references the DMS file with entity_type/entity_id.
This unifies the storage layer: one upload path, one download path,
one permission model, one deduplication (content_hash).
Revision ID: 0071
Revises: 0070
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID as PGUUID
revision = "0071"
down_revision = "0070"
branch_labels = None
depends_on = None
def upgrade() -> None:
op.create_table(
"entity_attachments",
sa.Column("id", PGUUID(as_uuid=True), primary_key=True, server_default=sa.text("gen_random_uuid()")),
sa.Column("tenant_id", PGUUID(as_uuid=True), sa.ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False),
sa.Column("entity_type", sa.String(50), nullable=False),
sa.Column("entity_id", PGUUID(as_uuid=True), nullable=False),
sa.Column("dms_file_id", PGUUID(as_uuid=True), sa.ForeignKey("files.id", ondelete="RESTRICT"), nullable=False),
sa.Column("category", sa.String(50), nullable=True),
sa.Column("display_name", sa.String(255), nullable=True),
sa.Column("owner_id", PGUUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
sa.Column("created_by", PGUUID(as_uuid=True), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("NOW()"), nullable=False),
sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.text("NOW()"), nullable=False),
sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
)
op.create_index("ix_entity_attachments_entity", "entity_attachments", ["entity_type", "entity_id", "tenant_id"])
op.create_index("ix_entity_attachments_tenant", "entity_attachments", ["tenant_id"])
op.create_index("ix_entity_attachments_dms_file", "entity_attachments", ["dms_file_id"])
op.create_index("ix_entity_attachments_owner", "entity_attachments", ["owner_id"])
# Enable RLS on entity_attachments (tenant isolation)
op.execute("ALTER TABLE entity_attachments ENABLE ROW LEVEL SECURITY")
op.execute(
"CREATE POLICY entity_attachments_tenant_isolation ON entity_attachments "
"FOR ALL "
"USING (tenant_id = current_setting('app.current_tenant_id', true)::uuid) "
"WITH CHECK (tenant_id = current_setting('app.current_tenant_id', true)::uuid)"
)
# Grant to crm_api and crm_worker
op.execute("GRANT SELECT, INSERT, UPDATE, DELETE ON entity_attachments TO crm_api, crm_worker")
op.execute("GRANT USAGE ON SCHEMA public TO crm_api, crm_worker")
def downgrade() -> None:
op.execute("DROP POLICY IF EXISTS entity_attachments_tenant_isolation ON entity_attachments")
op.drop_table("entity_attachments")