3 files changed, 33 insertions, 4 deletions
diff --git a/cli/app/sql/models/page.py b/cli/app/sql/models/page.py
index 2f7065b..35efa39 100644
--- a/cli/app/sql/models/page.py
+++ b/cli/app/sql/models/page.py
@@ -1,11 +1,11 @@
 from sqlalchemy import create_engine, Table, Column, Text, String, Integer, DateTime, JSON, ForeignKey
-from sqlalchemy.orm import relationship
+from sqlalchemy.orm import relationship, foreign, remote
 import sqlalchemy.sql.functions as func
 from sqlalchemy_utc import UtcDateTime, utcnow
 from wtforms_alchemy import ModelForm
 
 from app.sql.common import db, Base, Session
-# from app.sql.models.graph import Graph
+from app.sql.models.tile import Tile
 
 from app.settings import app_cfg
 
@@ -23,7 +23,7 @@ class Page(Base):
   updated_at = Column(UtcDateTime(), onupdate=utcnow())
 
   tiles = relationship("Tile", foreign_keys="Tile.page_id", lazy='dynamic', order_by="asc(Tile.sort_order)")
-  backlinks = relationship("Tile", foreign_keys="Tile.target_page_id", lazy='dynamic')
+  backlinks = relationship("Tile", primaryjoin=id == foreign(Tile.target_page_id), lazy='dynamic')
 
   def toJSON(self):
     return {
diff --git a/cli/app/sql/models/tile.py b/cli/app/sql/models/tile.py
index 3f6ce31..ed4a5f8 100644
--- a/cli/app/sql/models/tile.py
+++ b/cli/app/sql/models/tile.py
@@ -18,7 +18,7 @@ class Tile(Base):
   id = Column(Integer, primary_key=True)
   graph_id = Column(Integer, ForeignKey('graph.id'), nullable=True)
   page_id = Column(Integer, ForeignKey('page.id'), nullable=True)
-  target_page_id = Column(Integer, ForeignKey('page.id'), nullable=True)
+  target_page_id = Column(Integer, nullable=True)
   type = Column(String(16, convert_unicode=True), nullable=False)
   sort_order = Column(Integer, default=0)
   settings = Column(JSON, default={}, nullable=True)
diff --git a/cli/app/sql/versions/202103201916_remove_foreign_key_constraint_from_.py b/cli/app/sql/versions/202103201916_remove_foreign_key_constraint_from_.py
new file mode 100644
index 0000000..ed19feb
--- /dev/null
+++ b/cli/app/sql/versions/202103201916_remove_foreign_key_constraint_from_.py
@@ -0,0 +1,29 @@
+"""remove foreign key constraint from target_page_id
+
+Revision ID: 9b687880918d
+Revises: 3f7df6bf63b8
+Create Date: 2021-03-20 19:16:21.582373
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlalchemy_utc
+
+
+# revision identifiers, used by Alembic.
+revision = '9b687880918d'
+down_revision = '3f7df6bf63b8'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('tile_ibfk_3', 'tile', type_='foreignkey')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_foreign_key('tile_ibfk_3', 'tile', 'page', ['target_page_id'], ['id'])
+    # ### end Alembic commands ###