Rails has_many through with where condition

Question

I have the following associations in my Survey model:

has_many :survey_group_lists, -> { order 'sequence ASC, group_id ASC' }
has_many :groups, through: :survey_group_lists

I want to add where cluase to :groups association so it will return only active groups. I've tried something like this:

has_many :groups, -> { where(active: true) }, through: :survey_group_lists

but it returns me an error:

ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR:  missing FROM-clause entry for table "slide_groups"

What I'm doing wrong?

Edit: I'm using Rails 5.

Answer 1

has_many :groups, -> {where('groups.active' => true)}, through: :survey_group_lists

This is correct.

Note that the lambda has to be the second argument , otherwise you will see syntax error, unexpected '\\n', expecting => .

Answer 2

尝试这个：

has_many :groups, through: :survey_group_lists, -> { where(groups: {active: true}) }

Answer 3

它应该是：

has_many :groups, through: :survey_group_lists, -> { where(groups: { active: true } ) }