Association filtering and inner join

[mickhansen]

Makes it possible to force a INNER JOIN by setting required: true as a option to include:

Project.findAll({
  include: [
    {model: User, required: true}}
  ]
})
// SELECT * FROM project INNER JOIN user ON project.user_id = user.id 

If there is a where condition on the include it will be required: true by default.

Project.findAll({
  include: [
    {model: User, where: {last_name: 'Hansen'}}
  ]
})
// SELECT * FROM project INNER JOIN user ON project.user_id = user.id AND user.last_name = 'Hansen'

[JohannesBeranek]

just commenting in case someone else finds this: reading the source it's
required ? 'INNER JOIN' : 'LEFT OUTER JOIN'

[mickhansen]

@griffin1987 good catch, i made a typo which i've corrected now.

[davidrapin]

@JohannesBeranek thank you !!