Is there any way to omit null values?

What are you doing?

I have a model defined as bellow:

const Scene = sequelize.define(
  'scene',
  {
    sceneId: { type: Sequelize.STRING, allowNull: false, primaryKey: true },
    owner: { type: Sequelize.STRING, allowNull: false },
    name: Sequelize.STRING,
    description: Sequelize.STRING,
    width: Sequelize.INTEGER,
    height: Sequelize.INTEGER
  }
)

When I query one instance use Scene.findOne and send back to express:

const scene = Scene.findOne({...})
res.json(scene)

I get a scene like this:

{
  "sceneId": "12356",
  "owner": "sam",
  "name": null,
  "description": null,
  "width": null,
  "height": null
}

As null would break our webapp, I would like to have this:

{
  "sceneId": "12356",
  "owner": "sam"
}

Is there any way to omit these null values when calling scene.toJSON()?

To Reproduce Steps to reproduce the behavior:

1. Define models X, Y, …
2. Run the following
3. See error

What do you expect to happen?

I wanted Foo!

What is actually happening?

But the output was bar!

Output, either JSON or SQL

Environment

Dialect:

• mysql
• postgres
• sqlite
• mssql
• any Dialect library version: XXX Database version: XXX Sequelize version: XXX Node Version: XXX OS: XXX If TypeScript related: TypeScript version: XXX Tested with latest release:
• No
• Yes, specify that version:

[jingsam]

@knoxcard I found a workaround that using JSON.stringify(value, replacer):

JSON.stringify(scene, (k, v) => (v === null ? undefined : v))

if you are using express, you can do like this:

app.set('json replacer', (k, v) => (v === null ? undefined : v))

[knoxcard]

Setup getters in your model…

const Scene = sequelize.define(
  'scene',
  {
    sceneId: { type: Sequelize.STRING, allowNull: false, primaryKey: true },
    owner: { type: Sequelize.STRING, allowNull: false },
    name: {
      type: Sequelize.STRING
      get() {
        if(!this.getDataValue('name'))
          return
        return this.getDataValue('name')
      }
    }
  }
)

http://docs.sequelizejs.com/manual/models-definition.html#getters--amp--setters