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I'm trying to check if a find method returns a result. My find method is the following:
post = Post.find(:all, :conditions => { :url => params['url'] }, :limit => 1)
What would be a good way to check that post contains a result?
368
ActiveRecord::Base indicates that the ActiveRecord class or module has a static inner class called Base that you're extending.
Active Record allows you to validate the state of a model before it gets written into the database. There are several methods that you can use to check your models and validate that an attribute value is not empty, is unique and not already in the database, follows a specific format, and many more.
ActiveRecord is an ORM. It's a layer of Ruby code that runs between your database and your logic code. When you need to make changes to the database, you'll write Ruby code, and then run "migrations" which makes the actual changes to the database.
find :all returns an empty array ([]) if no rows are returned, so you can just use it this way:
post = Post.find(:all, :conditions => { :url => params['url'] }, :limit => 1)
unless post.empty?
# do something...
end
By the way, if you do find :all you're going to get an array, not a single row. If you're trying to get just one Post, it would be cleaner to use the find_by helper or find :first or just first instead:
post = Post.find_by_url params['url']
# or
post = Post.first :conditions => { :url => params['url'] }
# then...
if post
# do something...
end
You can try ActiveRecord::Base.exists? before
Post.exists?(:conditions => { :url => params['url'] })
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