Fix #1409

Find pending migrations and return them in getUndoneMigrations

lib/migrator.js

@@ -97,6 +97,12 @@ module.exports = (function() {
       callback && callback(null, result);
     };
 
+    var filterByMigrationId = function(migrations, migrationIds, callback) {
+      var result = migrations.filter(function(migration) { return migrationIds.indexOf(migration.migrationId) === -1;
+      });
+      callback && callback(null, result);
+    };
+
     var migrationFiles = fs.readdirSync(this.options.path).filter(function(file) {
       return self.options.filesFilter.test(file);
     });
@@ -109,6 +115,22 @@ module.exports = (function() {
       return parseInt(a.filename.split('-')[0]) - parseInt(b.filename.split('-')[0]);
     });
 
+    var existingMigrationIds = migrations.map(function(migration) {
+      return migration.migrationId;
+    });
+
+    var getPendingMigrations = function(callback) {
+      getAllMigrationIdsFromDatabase.call(self).success(function(allMigrationIds) {
+        allMigrationIds = allMigrationIds.map(function(migration) {
+          return parseInt(migration.to);
+        });
+        if (allMigrationIds) {
+          filterByMigrationId(migrations, allMigrationIds, callback);
+        }
+
+      });
+    };
+
     if (this.options.from) {
       filterFrom(migrations, this.options.from, function(err, migrations) {
         if (self.options.to) {
@@ -118,24 +140,13 @@ module.exports = (function() {
         }
       });
     } else {
-      getLastMigrationIdFromDatabase.call(this).success(function(lastMigrationId) {
-        if (lastMigrationId) {
-          filterFrom(migrations, lastMigrationId, function(err, migrations) {
-            if (self.options.to) {
-              filterTo(migrations, self.options.to, callback);
-            } else {
-              callback && callback(null, migrations);
-            }
-          }, { withoutEqual: true });
-        } else {
-          if (self.options.to) {
-            filterTo(migrations, self.options.to, callback);
-          } else {
-            callback && callback(null, migrations);
-          }
+      getPendingMigrations(function(err, pendingMigrations) {
+        if (self.options.to) {
+          filterTo(pendingMigrations, self.options.to, callback);
+        }
+        else {
+          callback && callback(err, pendingMigrations);
         }
-      }).error(function(err) {
-        callback && callback(err, null);
       });
     }
   };
@@ -222,6 +233,31 @@ module.exports = (function() {
 
   // private
 
+  var getAllMigrationIdsFromDatabase = Migrator.prototype.getAllMigrationIdsFromDatabase = function() {
+    var self = this;
+
+    return new Utils.CustomEventEmitter(function(emitter) {
+      self
+        .findOrCreateSequelizeMetaDAO()
+        .success(function(SequelizeMeta) {
+          SequelizeMeta
+            .findAll({
+              order: 'id DESC',
+              attributes: ['to']
+            })
+            .success(function(meta) {
+              emitter.emit('success', meta ? meta : null);
+            })
+            .error(function(err) {
+              emitter.emit('error', err);
+            });
+        })
+        .error(function(err) {
+          emitter.emit('error', err);
+        });
+    }).run();
+  };
+
   var getLastMigrationFromDatabase = Migrator.prototype.getLastMigrationFromDatabase = function() {
     var self = this;
 

test/migrator.test.js

@@ -107,6 +107,21 @@ describe(Support.getTestDialectTeaser("Migrator"), function() {
         })
       })
     })
+
+    it("returns pending migrations", function(done) {
+      this.init(undefined, function(migrator, SequelizeMeta) {
+        SequelizeMeta.create({ from: 20111117063700, to: 20111117063700 }).success(function() {
+          SequelizeMeta.create({ from: 20111117063700, to: 20130909185621 }).success(function() {
+            migrator.getUndoneMigrations(function(err, migrations) {
+              expect(err).to.be.null
+              expect(migrations).to.have.length(14)
+              expect(migrations[0].filename).to.equal('20111130161100-emptyMigration.js')
+              done()
+            })
+          })
+        })
+      })
+    })
   })
 
   describe('migrations', function() {