Sequelize TypeError：defineCall 不是函数

Question

Working on an express project with a SQLite database.

I'm getting an Sequelize TypeError that I've been working on for hours but I'm coming up against a brick wall:

   C:\-----\node_modules\sequelize\lib\sequelize.js:392
          this.importCache[path] = defineCall(this, DataTypes);
                                   ^

    TypeError: defineCall is not a function
        at Sequelize.import (C:\----\node_modules\sequelize\lib\sequelize.js:392:32)
 at C:\----\models\index.js:25:32

After doing some research, it appears that this could be caused when trying to import a non-sequelize object. Below is the problematic index.js file.

index.js:

var Sequelize = require('sequelize');

var config = {
  dialect: 'sqlite',
  storage: 'library.db'
};

var connection = new Sequelize(config);
var contents = fs.readdirSync(__dirname);
var db = {};


contents = contents.filter(function(file){

  var currFileName = __filename.split('/');
  var checkOne = file.substr(file.length - 3, 3) === '.js';
  var checkTwo = file !== currFileName[currFileName.length - 1];

  return checkOne && checkTwo;
});

contents.forEach(function(file){
  var path = [__dirname, file].join('/');
  var model = connection.import(path);

  db[model.name] = model;
});

Object.keys(db).forEach(function(modelName){
  var model = db[modelName];

  if(model.associate) {
    model.associate(db);
  }
});


module.exports = {
  models: db,
  connection: connection
};

I do not have any function called defineCall, any idea where the error is coming from?

Answer 1

This is indeed caused by importing a file that's not a Sequelize model. In my case, it was because my index.js was pulling in my test files as well as the models, which were in the same directory. Try adding another check like checkOne to exclude anything that ends with .test.js .

Answer 2

With the hint from the answer by @Floppy, I got to realise that it would be better if we stored those related files encapsulated in a folder.

For eg. make a folder named Models and store your index.js with all the models (eg. User model, photos model, etc) and then try.

Thanks.