Sinatra and Datamapper - inserting data to a one to many relationship table?

I believe that through => Resource is only needed if you are doing a many-to-many relationship. A one-to-many, which I think is what you want, does not require that. Check out the post and comment relationship shown on the associations page EDIT for comment: If I were you, I would name my form fields normally and construct the database object manually, for example: form action="/create" method="post"> Article Title Article Body Url params:title, :body => params:body ) @url = url.

New( url_01 => params:url ) @article. Url = @url if @article. Save redirect "/articles" else redirect "/articles/new" end end.

I believe that , through => Resource is only needed if you are doing a many-to-many relationship. A one-to-many, which I think is what you want, does not require that. Check out the post and comment relationship shown on the associations page.

EDIT for comment: If I were you, I would name my form fields normally and construct the database object manually, for example: Article Title Article Body Url and then: post '/create' do @article = Article. New( :title => params:title, :body => params:body ) @url = url. New( url_01 => params:url ) @article.

Url = @url if @article. Save redirect "/articles" else redirect "/articles/new" end end.

Does not work, the input does not get saved into database. – little. Programmer Jul 18 '10 at 17:52 In the above example, he just has "url" as the field in the html form.

If you are showing all three, then you would need to update the url. New constructor with all three from the html form. – Ian Jul 19 '10 at 14:39.

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