Add cascade option to bulkDelete. Closes #1905

lib/dialects/postgres/query-generator.js

@@ -304,12 +304,20 @@ module.exports = (function() {
     },
 
     deleteQuery: function(tableName, where, options, model) {
+      var query;
+
       options = options || {};
 
       tableName = Utils.removeTicks(this.quoteTable(tableName), '"');
 
       if (options.truncate === true) {
-        return 'TRUNCATE ' + QueryGenerator.quoteIdentifier(tableName);
+        query = 'TRUNCATE ' + QueryGenerator.quoteIdentifier(tableName);
+
+        if (options.cascade) {
+          query += ' CASCADE';
+        }
+
+        return query;
       }
 
       if (Utils._.isUndefined(options.limit)) {
@@ -322,7 +330,7 @@ module.exports = (function() {
         primaryKeys[tableName] = Object.keys(model.primaryKeys);
       }
 
-      var query = 'DELETE FROM <%= table %> WHERE <%= primaryKeys %> IN (SELECT <%= primaryKeysSelection %> FROM <%= table %> WHERE <%= where %><%= limit %>)';
+      query = 'DELETE FROM <%= table %> WHERE <%= primaryKeys %> IN (SELECT <%= primaryKeysSelection %> FROM <%= table %> WHERE <%= where %><%= limit %>)';
 
       var pks;
       if (primaryKeys[tableName] && primaryKeys[tableName].length > 0) {

lib/model.js

@@ -1260,14 +1260,16 @@ module.exports = (function() {
   };
 
   /**
-   * Delete multiple instances
+   * Delete multiple instances, or set their deletedAt timestamp to the current time if `paranoid` is enabled.
    *
    * @param  {Object}   [where]                         Options to describe the scope of the search.
    * @param  {Object}   [options]
    * @param  {Boolean}  [options.hooks=true]            Run before / after bulk destroy hooks?
    * @param  {Boolean}  [options.individualHooks=false] If set to true, destroy will find all records within the where parameter and will execute before / after bulkDestroy hooks on each row
    * @param  {Number}   [options.limit]                 How many rows to delete
-   * @param  {Boolean}  [options.truncate]              If set to true, dialects that support it will use TRUNCATE instead of DELETE FROM. If a table is truncated the where and limit options are ignored
+   * @param  {Boolean}  [options.force=false]           Delete instead of setting deletedAt to current timestamp (only applicable if `paranoid` is enabled)
+   * @param  {Boolean}  [options.truncate=false]        If set to true, dialects that support it will use TRUNCATE instead of DELETE FROM. If a table is truncated the where and limit options are ignored
+   * @param  {Boolean}  [options.cascade=false]         Only used in conjuction with TRUNCATE. Truncates  all tables that have foreign-key references to the named table, or to any tables added to the group due to CASCADE.
    *
    * @return {Promise<undefined>}
    */
@@ -1275,7 +1277,8 @@ module.exports = (function() {
     options = Utils._.extend({
       hooks: true,
       individualHooks: false,
-      force: false
+      force: false,
+      cascade: false
     }, options || {});
 
     options.type = QueryTypes.BULKDELETE;

test/postgres/query-generator.test.js

@@ -771,6 +771,9 @@ if (dialect.match(/^postgres/)) {
           arguments: ['myTable', undefined, {truncate: true}],
           expectation: "TRUNCATE \"myTable\""
         }, {
+          arguments: ['myTable', undefined, {truncate: true, cascade: true}],
+          expectation: "TRUNCATE \"myTable\" CASCADE"
+        }, {
           arguments: ['myTable', 1, {limit: 10, truncate: true}],
           expectation: "TRUNCATE \"myTable\""
         }, {