Support of ON DUPLICATE KEY for 'bulkCreate' method (only supported by mysql & mariadb)

lib/dialects/mysql/query-generator.js

@@ -179,9 +179,10 @@ module.exports = (function() {
     },
 
     bulkInsertQuery: function(tableName, attrValueHashes, options) {
-      var query = 'INSERT<%= ignoreDuplicates %> INTO <%= table %> (<%= attributes %>) VALUES <%= tuples %>;'
+      var query = 'INSERT<%= ignoreDuplicates %> INTO <%= table %> (<%= attributes %>) VALUES <%= tuples %><%= onDuplicateKeyUpdate %>;'
         , tuples = []
-        , allAttributes = [];
+        , allAttributes = []
+        , onDuplicateKeyUpdate = '';
 
       Utils._.forEach(attrValueHashes, function(attrValueHash, i) {
         Utils._.forOwn(attrValueHash, function(value, key, hash) {
@@ -197,13 +198,21 @@ module.exports = (function() {
         ')');
       }.bind(this));
 
+      if (options && options.updateOnDuplicate instanceof Array && options.updateOnDuplicate.length) {
+        onDuplicateKeyUpdate += ' ON DUPLICATE KEY UPDATE ' + options.updateOnDuplicate.map(function(attr) {
+          var key = this.quoteIdentifier(attr);
+          return key + '=VALUES(' + key + ')';
+        }.bind(this)).join(',');
+      }
+
       var replacements = {
         ignoreDuplicates: options && options.ignoreDuplicates ? ' IGNORE' : '',
         table: this.quoteTable(tableName),
         attributes: allAttributes.map(function(attr) {
                       return this.quoteIdentifier(attr);
                     }.bind(this)).join(','),
-        tuples: tuples
+        tuples: tuples,
+        onDuplicateKeyUpdate: onDuplicateKeyUpdate
       };
 
       return Utils._.template(query)(replacements);

lib/model.js

@@ -1232,6 +1232,7 @@ module.exports = (function() {
    * @param  {Boolean}      [options.hooks=true]             Run before / after bulk create hooks?
    * @param  {Boolean}      [options.individualHooks=false]  Run before / after create hooks for each individual Instance? BulkCreate hooks will still be run if options.hooks is true.
    * @param  {Boolean}      [options.ignoreDuplicates=false] Ignore duplicate values for primary keys? (not supported by postgres)
+   * @param  {Boolean}      [options.updateOnDuplicate]      Fields to update if row key already exists (on duplicate key update)? (only supported by mysql & mariadb)
    *
    * @return {Promise<Array<Instance>>}
    */
@@ -1257,9 +1258,13 @@ module.exports = (function() {
       options = Utils._.extend(options, fieldsOrOptions);
     }
 
-    if (this.sequelize.options.dialect === 'postgres' && options.ignoreDuplicates) {
+    var dialect = this.sequelize.options.dialect;
+    if (options.ignoreDuplicates && dialect === 'postgres') {
       return Promise.reject(new Error('Postgres does not support the \'ignoreDuplicates\' option.'));
     }
+    if (options.updateOnDuplicate && ['mysql', 'mariadb'].indexOf(dialect) === -1) {
+      return Promise.reject(new Error(dialect + ' does not support the \'updateOnDuplicate\' option.'));
+    }
 
     var self = this
       , createdAtAttr = this._timestampAttributes.createdAt

test/dialects/mysql/query-generator.test.js

@@ -424,6 +424,9 @@ if (Support.dialectIsMySQL()) {
         }, {
           arguments: ['myTable', [{name: 'foo'}, {name: 'bar'}], {ignoreDuplicates: true}],
           expectation: "INSERT IGNORE INTO `myTable` (`name`) VALUES ('foo'),('bar');"
+        }, {
+          arguments: ['myTable', [{name: 'foo'}, {name: 'bar'}], {updateOnDuplicate: ['name']}],
+          expectation: "INSERT INTO `myTable` (`name`) VALUES ('foo'),('bar') ON DUPLICATE KEY UPDATE `name`=VALUES(`name`);"
         }
       ],