rails rendering database information in html

Question

I have a simple show method that has to render all the messages in a conversation.

Everything is basic in my code, I have a show method that goes to this HTML (show.html.haml):

%section#list
  =  @conversation.messages.each do |message|
    .row
      = message.content
      = message.participant.user_id

And when I go to this show page, I have my content, but I also have a random line from the database (my HTML contains nothing else). Here is what I get :

This is a test 1 

[#< MyghtDefaultMessenger::Message id: 1, content: "This is a test", deleted: false, participant_id: 1, created_at: "2017-02-13 14:52:45", updated_at: "2017-02-13 14:52:45" >]

(I added a blank space right next to the < and > signs else SO would just render, but they aren't here in the original. [#] )

Here is my controller method in conversation_controller :

def show
  @conversation.messages.order(:created_at)
end

And the only specificity is that my conversation has many participants, my participants have many messages, and I get the messages of a conversation through participants.

Never used HAML so this is a guess. I think its because of this = in = @conversation.messages.each do |message| . In ERB = is not used when you dont want to print the output of that particular ruby code, for example. each block. — Sajan
– Sajan, Commented Feb 21, 2017 at 9:36

Deepak Mahakale · Accepted Answer · 2017-02-21 09:44:19Z

1

You need to change = with -

= prints the result of evaluated code
- will just evaluate it

Change the code to

%section#list
  - @conversation.messages.each do |message|
    .row
      = message.content
      = message.participant.user_id

The second output you are getting is the result which is returned after the @conversation.messages.each do |message| is evaluated.

NOTE: Use - whenever you just need to evaluate for e.g. each, if - else, Assigning variable in haml

edited Feb 21, 2017 at 9:44

answered Feb 21, 2017 at 9:39

Deepak Mahakale

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1 Comment

RiddlerNewComer Over a year ago

Wow thanks a lot it looks ridiculous now that you said it but when you don't know it.. thanks again

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