Basic implementation of capturing foreign key status

lib/associations/belongs-to.js

@@ -24,6 +24,12 @@ module.exports = (function() {
 
 
     this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.target.tableName) + "Id", this.source.options.underscored)
     this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.target.tableName) + "Id", this.source.options.underscored)
     newAttributes[this.identifier] = { type: DataTypes.INTEGER }
     newAttributes[this.identifier] = { type: DataTypes.INTEGER }
+    if(typeof this.options.foreignKey === "undefined" || this.options.foreignKey === true) {
+      newAttributes[this.identifier].references = this.target.tableName,
+      newAttributes[this.identifier].referencesKeys = Utils._.reduce(this.source.rawAttributes, function(memo, value, key) { if(value.primaryKey) { memo.push(key) } return memo }, [])
+      newAttributes[this.identifier].onDelete = this.options.onDelete,
+      newAttributes[this.identifier].onUpdate = this.options.onUpdate
+    }
     Utils._.defaults(this.source.rawAttributes, newAttributes)
     Utils._.defaults(this.source.rawAttributes, newAttributes)
 
 
     // Sync attributes to DAO proto each time a new assoc is added
     // Sync attributes to DAO proto each time a new assoc is added

lib/associations/has-many.js

@@ -65,6 +65,12 @@ module.exports = (function() {
     } else {
     } else {
       var newAttributes = {}
       var newAttributes = {}
       newAttributes[this.identifier] = { type: DataTypes.INTEGER }
       newAttributes[this.identifier] = { type: DataTypes.INTEGER }
+      if(typeof this.options.foreignKey === "undefined" || this.options.foreignKey === true) {
+        newAttributes[this.identifier].references = this.source.tableName
+        newAttributes[this.identifier].referencesKeys = Utils._.reduce(this.source.rawAttributes, function(memo, value, key) { if(value.primaryKey) { memo.push(key) } return memo }, [])
+        newAttributes[this.identifier].onDelete = this.options.onDelete
+        newAttributes[this.identifier].onUpdate = this.options.onUpdate
+      }
       Utils._.defaults(this.target.rawAttributes, newAttributes)
       Utils._.defaults(this.target.rawAttributes, newAttributes)
     }
     }
 
 

lib/associations/has-one.js

@@ -29,6 +29,12 @@ module.exports = (function() {
 
 
     this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.source.tableName) + "Id", this.options.underscored)
     this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.source.tableName) + "Id", this.options.underscored)
     newAttributes[this.identifier] = { type: DataTypes.INTEGER }
     newAttributes[this.identifier] = { type: DataTypes.INTEGER }
+    if(typeof this.options.foreignKey === "undefined" || this.options.foreignKey === true) {
+      newAttributes[this.identifier].references = this.source.tableName,
+      newAttributes[this.identifier].referencesKeys = Utils._.reduce(this.source.rawAttributes, function(memo, value, key) { if(value.primaryKey) { memo.push(key) } return memo }, [])
+      newAttributes[this.identifier].onDelete = this.options.onDelete,
+      newAttributes[this.identifier].onUpdate = this.options.onUpdate
+    }
     Utils._.defaults(this.target.rawAttributes, newAttributes)
     Utils._.defaults(this.target.rawAttributes, newAttributes)
 
 
     // Sync attributes to DAO proto each time a new assoc is added
     // Sync attributes to DAO proto each time a new assoc is added

spec/associations/has-many.spec.js

@@ -322,5 +322,28 @@ describe(Helpers.getTestDialectTeaser("HasMany"), function() {
         })
         })
       })
       })
     })
     })
+
+    describe("Foreign key constraints", function() {
+
+      it("can cascade deletes", function(done) {
+        var User = this.sequelize.define('User', { username: Sequelize.STRING })
+          , Task = this.sequelize.define('Task', { title: Sequelize.STRING })
+
+        User.hasMany(Task, {onDelete: 'cascade'})
+
+        this.sequelize.sync({ force: true }).success(function() {
+          User.create({ username: 'foo' }).success(function(user) {
+            Task.create({ title: 'task' }).success(function(task) {
+              user.setTasks([task]).success(function() {
+                debugger
+                done()
+              })
+            })
+          })
+        })
+      })
+
+    })
+
   })
   })
 })
 })