Implement basic foreign key supportv0.1.13

1 files changed, 23 insertions, 0 deletions

diff --git a/app/index.js b/app/index.js
index d514f10..2507dd2 100644
--- a/app/index.js
+++ b/app/index.js
@@ -78,6 +78,7 @@ function OKCMS(options) {
   });
   var resourceCache = this._resourceCache =
       this._createResources(resourceConfig, db, schemas);
+  this._resolveForeignKeys(resourceCache)
   var errorHandler = createErrorHandlerProducer(
       templateProvider, adminTemplateProvider, debug);
   // Create view instances from config
@@ -154,6 +155,21 @@ OKCMS.prototype._createResources = function(resourceConfig, db, schemaCache) {
   return ResourceCache(resources);
 };
 
+OKCMS.prototype._resolveForeignKeys = function(resourceCache) {
+  resourceCache.forEach(function(resource) {
+    Object.keys(resource.foreignKeys).forEach(function(field) {
+      var foreignKeyType = resource.foreignKeys[field]
+      var keyedResource = resourceCache.get(foreignKeyType)
+      if (!keyedResource) {
+        throw new Error(format(
+            "Foreign key field '%s' in '%s' resource references unknown" +
+            "resource of type '%s'", field, resource.type, foreignKeyType))
+      }
+      resource._linkForeignKey(field, resourceCache.get(foreignKeyType))
+    })
+  })
+}
+
 OKCMS.prototype._createViews = function(viewConfig, db,
     meta, resourceCache, templateProvider, errorHandler) {
   viewConfig = viewConfig || {};
@@ -279,6 +295,13 @@ ResourceCache.prototype.get = function(type, id) {
   }
 };
 
+ResourceCache.prototype.forEach = function(cb) {
+  cb = cb || function() {}
+  Object.keys(this._cache).forEach(function(key) {
+    cb(this._cache[key])
+  }.bind(this))
+}
+
 /**
  * Higher order function implementing customizable error handling
  */