Colin Mr. wrote in post #1144182:
Text area (as in the <textarea> tag) has no support for image data. It
accepts plain text only. In order to upload images you need a <input
type="file"> along with adding the enctype="multipart/formdata"
attribute to the form tag (<form enctype="multipart/formdata" ...>).
There are gems to help you with this:
http://bcjordan.com/posts/rails-image-uploading-framework-comparison/
I've used Paperclip myself in the past, but have also heard good things
about Carrierwave.
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