Skip to main content

Ruby on Rails as_json limit

I have this "as_json" method in my Post model:

def as_json(options={})
    super(options.merge(:include => { :comments => { :include => [:user] }, :hashtags => {}, :user => {}, :group => {} }))
end

I'd like to set a limit attribute in :comments like this:

def as_json(options={})
    super(options.merge(:include => { :comments => { :include => [:user], :limit => 10 }, :hashtags => {}, :user => {}, :group => {} }))
end

but it doesn't work.

How should I proceed?

Solved

I think that you have only one possibility.

I suppouse that you have a has_many :comments association in your Post model

So you can define the next has_many association in your Post model, something like this:

has_many :ten_comments, -> { limit(10) }, class_name: "Comment", foreign_key: :post_id

And then you will be able to do this in the as_json method:

def as_json(options={})
   super(options.merge(:include => { :ten_comments => { :include => [:user] }, :hashtags => {}, :user => {}, :group => {} }))
end

Sorry for posting four years later, but I hope that someone find useful your question and this answer.


Comments

Post a Comment

Popular posts from this blog

How to make shortest code?

I use the following code to insert multi array to database: foreach($request->category as $k => $v){ $category[] = array( "category_id" => $v, "announcement_id" => $announcement->id ); } AnnouncementCategory::insert($category); So, input data is POST array $request->category . I need to refactoring this code I tried this code: $announcement->categories()->attach($request->category); In model Announcement I have: public function categories() { return $this->hasMany("App\AnnouncementCategory", "announcement_id", "id"); } Solved If you define in your Announcement model relationship like this: public function categories() { return $this->belongsToMany(AnnouncementCategory::class); } you can do it like this: $announcement->categories()->attach($request->c...
Post a Comment
Read more

removing zeros from the right and adding some to the left of a number?

Suppose I have the following vector test First I want to get the remove the zeros, to obtain something like: test2 Then, I want to add zeros to the left in order to have 6 digits. That part I know how to do: test3 Can you help me with the first step? Solved You can use regular expressions: as.integer(sub("0*$", "", test)) # [1] 3745 22704 Also, here is a fun one using recursion: remove_zeroes Benchmarks: test Late to the party but here's a qdap approach: test
Post a Comment
Read more