Ruby fetch image tag from content field in db

Question

In my app i have article model, and there i have content field, where are stored all my html data of news articles, like image video etc...

but now i need to format rss feed, and i have to fetch all this img tag, and place them to other xml branch.

for example content:

<h1>asdasd</h1>
content...
<img ... />

and my rss builder view now is such:

xml.instruct! :xml, :version => "1.0"#, :encoding => "windows-1251" 
xml.rss :version => "2.0" do
xml.channel do
for article in @posts
      xml.item do
        xml.title article.title
xml.description article.intro_text
end
end
end

maybe use something like gsub, regex? or how it is better to do? please give an advice. Thank you.

score 0 · Accepted Answer · edited May 23 '17 at 12:05

0

You can use the String#scan method, which returns an array of strings that match the provided regex pattern. You would just have to come up with the pattern to match the image tags you want to pull out.

a = "cruel world"
a.scan(/\w+/)        #=> ["cruel", "world"]
a.scan(/.../)        #=> ["cru", "el ", "wor"]
a.scan(/(...)/)      #=> [["cru"], ["el "], ["wor"]]
a.scan(/(..)(..)/)   #=> [["cr", "ue"], ["l ", "wo"]]

For matching the img tags, you could try this pattern which I copied from another SO answer.

<img\s[^>]*?src\s*=\s*['\"]([^'\"]*?)['\"][^>]*?>

This pattern seems to work as per a rubular test.

edited May 23 '17 at 12:05

Community

1
1

answered Sep 22 '14 at 21:56

animatedgif

1,060
12
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hm, could you help me to fetch this ? – brabertaser19 Sep 23 '14 at 06:26
@brabertaser1992 a simple google search yields many results. I've updated my answer to include a pattern I copied from another SO answer. – animatedgif Sep 23 '14 at 13:41
not exactly what i mean, in img could be style etc, so i need to fetch whole , but ok, will try to search – brabertaser19 Sep 23 '14 at 15:08

Ruby fetch image tag from content field in db

1 Answers1