fixed self association with belongs-to

lib/sequelize/associations/belongs-to.js

@@ -5,6 +5,10 @@ var BelongsTo = module.exports = function(srcModel, targetModel, options) {
   this.source = srcModel
   this.target = targetModel
   this.options = options
+  this.isSelfAssociation = (this.source.tableName == this.target.tableName)
+  this.associationAccessor = this.isSelfAssociation
+    ? Utils.combineTableNames(this.target.tableName, this.options.as || this.target.tableName)
+    : this.target.tableName
 }
 
 // the id is in the source table

lib/sequelize/associations/mixin.js

@@ -15,7 +15,7 @@ var Associations = module.exports = {
       // the id is in this table
       var BelongsTo = require("./belongs-to")
       var association = new BelongsTo(this, associatedModel, Utils._.extend((options||{}), this.options))
-      this.associations[associatedModel.tableName] = association.injectAttributes()
+      this.associations[association.associationAccessor] = association.injectAttributes()
     },
     hasMany: function(associatedModel, options) {
       // the id is in the foreign table or in a connecting table

test/Model/belongsTo.js → test/Model/belongs-to.js

@@ -104,5 +104,18 @@ module.exports = {
         })
       })
     })
+  },
+  'it should correctly handle self associations': function(exit) {
+    var Person = sequelize.define('Person' + config.rand(), { name: Sequelize.STRING })
+
+    Person.belongsTo(Person, {as: 'Mother', foreignKey: 'MotherId'})
+    Person.belongsTo(Person, {as: 'Father', foreignKey: 'FatherId'})
+    
+    Person.sync({force: true}).on('success', function() {
+      var p = Person.build()
+      assert.isDefined(p.setFather)
+      assert.isDefined(p.setMother)
+      exit(function(){})
+    })
   }
 }
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test/Model/has-one.js

@@ -101,6 +101,15 @@ module.exports = {
   },
   'it should correctly associate with itself': function(exit) {
     var Person = sequelize.define('Person' + config.rand(), { name: Sequelize.STRING })
-    exit(function(){})
+
+    Person.hasOne(Person, {as: 'Mother', foreignKey: 'MotherId'})
+    Person.hasOne(Person, {as: 'Father', foreignKey: 'FatherId'})
+    
+    Person.sync({force: true}).on('success', function() {
+      var p = Person.build()
+      assert.isDefined(p.setFather)
+      assert.isDefined(p.setMother)
+      exit(function(){})
+    })
   }
 }
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