progress on relation completer

demo/sandbox.cpp

@@ -5,6 +5,48 @@
 #include "author.hpp"
 #include "book.hpp"
 
+
+/*
+ *  node author
+ *
+ *  relation_endpoints
+ *      1. - field_name "books"
+ *         - type_index <book>
+ *         - type "has_many"
+ *         - node <author>
+ *         - foreign endpoint (1) "author"
+ *
+ *  node book
+ *      2. - field_name "author_id"
+ *         - type_index <author>
+ *         - type "belongs_to"
+ *         - node <book>
+ *         - foreign endpoint (2) "books"
+ *
+ *  Attach process:
+ *
+ *  attach<author>
+ *  - relation completer detects "has_many<book>"
+ *  - has_many<book> doesn't find <book> (not yet attached)
+ *  - create endpoint (1) without foreign endpoint
+ *  - create node many_to_many_relation<author, book>("author_id", "id")
+ *  - 3. create endpoint
+ *      - field name "author_id"
+ *      - type_index <author>
+ *      - type "belongs_to"
+ *      - node <many_to_many_relation<author, book>>
+ *      - foreign endpoint (1) "author
+ *  - set foreign endpoint of (1) to endpoint (3)
+ *  - attach (internal) node<many_to_many_relation<author, book>>
+ *
+ *  attach<book>
+ *  - relation completer detects "belongs_to<author>"
+ *  - belongs_to<author> finds <book>
+ *  - check relation endpoints...
+ *
+ *
+ *
+ */
 using namespace demo;
 using namespace matador;
 int main() {
@@ -15,5 +57,4 @@ int main() {
 
     auto result = schema.attach<author>("authors")
         .and_then([&schema] { return schema.attach<book>("books"); });
-
 }