completely changed system of how are tables linked together

server/migrations/20250301152039_create_table_definitions.sql

@@ -1,4 +1,4 @@
--- Add migration script here
+-- Main table definitions
 CREATE TABLE table_definitions (
     id BIGSERIAL PRIMARY KEY,
     deleted BOOLEAN NOT NULL DEFAULT FALSE,
@@ -6,16 +6,21 @@ CREATE TABLE table_definitions (
     columns JSONB NOT NULL,
     indexes JSONB NOT NULL,
     created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
-    profile_id BIGINT NOT NULL REFERENCES profiles(id) DEFAULT 1,
-    linked_table_id BIGINT REFERENCES table_definitions(id)
+    profile_id BIGINT NOT NULL REFERENCES profiles(id) DEFAULT 1
+);
+
+-- Relationship table for multiple links
+CREATE TABLE table_definition_links (
+    source_table_id BIGINT NOT NULL REFERENCES table_definitions(id) ON DELETE CASCADE,
+    linked_table_id BIGINT NOT NULL REFERENCES table_definitions(id),
+    is_required BOOLEAN NOT NULL DEFAULT FALSE,
+    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (source_table_id, linked_table_id)
 );
 
 -- Create composite unique index for profile+table combination
 CREATE UNIQUE INDEX idx_table_definitions_profile_table
     ON table_definitions (profile_id, table_name);
 
--- Add self-referential foreign key constraint
-ALTER TABLE table_definitions
-    ADD CONSTRAINT fk_linked_table
-    FOREIGN KEY (linked_table_id)
-    REFERENCES table_definitions(id);
+CREATE INDEX idx_links_source ON table_definition_links (source_table_id);
+CREATE INDEX idx_links_target ON table_definition_links (linked_table_id);