passing size for image_tag to view via model

rubyonrails-talk
1

Hi group, I have a problem with an image_tag. It's rather complicated and I can't find an easy solution.

I have a model called "Medium" which can hold a paperclip file attachment or a remote url. I want to treat all media equally from my view, so if I need a preview picture, I use get_picture(size). This matches with paperclip's autogenerated thumbnails and everything is fine.

In case I have a youtube-video in my remote link, things are starting to get ugly. Fortunately youtube autogenerates preview pictures from the videos, and I am totally okay with these, the only problem is that I can't resize them properly without busting my view.

So what I need is a possibility to say my get_picture(size)-method something like

case size   when :large     return youtube_picture.png, size => "1000x1000"   when :small     return youtube_picture.png, size => "5x5" end

From the view, I want to call

<%= image_tag medium.get_picture(:small) %> and I don't want to pass in the parameter on view side, because that would be very repetitive.

My workaround was to make a method "get_size(size)", so that I can use <%= image_tag medium.get_picture:small, :size => medium.get_size(:small) %> but that's ugly and there has to be a better way to do this.

Is there any?

Thanks in advance!

2

How about something like this:

attr_reader :size

Sizes = {:small => '5x5'                 :large => '1000x1000'}

def get_preview(size)   ...   ... end

def small_preview   @small ||= get_preview(Sizes[:small])   @size = Sizes[:small] end

def large_preview   @large ||= get_preview(Sizes[:large])   @size = Sizes[:large] end

<%= image_tag medium.small_preview, :size => medium.size %>

3

Hi, thanks for your reply!

<%= image_tag medium.small_preview, :size => medium.size %>

Yeah, that is the solution I found, but I don't think it's pretty. Isn't there a possibility to make this better, like link_to method_returnvalue or something?

If you say no, I will cry :slight_smile:

4

I don't know enough about rails to say no. But I also don't understand what you are hoping for.

5

Hi,

if I call image_tag without the :size param, it can happen that, if I have images of different sizes, they bust my view because they all are of different sizes. If i call :size => "xxy" in every line of the code where I want a picture to be force-resized, i repeat myself over and over, and in the second I get the idea of changing one picture's dimension, I'm in trouble.

So what I want is my view to say to my model "hi, i want your image tag" and my model to say "here it is, oh, btw, it has a fixed resolution of 250x150 px, display this, kkthxbb"

Hope I made it clearer now? :slight_smile:

Thanks for your help anyway

6

Use a view helper to replace that code with a call to your helper <%= auto_size_image_tag( medium ) %>

Colin