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PORails 3 object.belongs_to_id to object.belongs_to.name?
 

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    <p>I have a rails 3 project where the index.html.erb currently includes <code>&lt;td&gt;&lt;%= chapter.university_id %&gt;&lt;/td&gt;</code> whereas what I want it to show should be <code>&lt;td&gt;&lt;%= chapter.university.name %&gt;&lt;/td&gt;</code> however, this is currently throwing the exception <strong>undefined method `name' for nil:NilClass</strong> Interestingly, chapter.foo.name is working to access information from another model to which "chapter" belongs. Can anyone help standardize this?</p> <p><strong><em>EDIT:</em></strong></p> <p>In an attempt to replicate this error in another way, I changed <code>&lt;td&gt;&lt;%= chapter.university.name %&gt;&lt;/td&gt;</code> to <code>&lt;td&gt;&lt;%= chapter.university.id %&gt;&lt;/td&gt;</code>, hoping that I could convince rails to give me university_id from the universities table, rather than the chapters table. Still no luck, but gave the error <strong>Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id</strong> rather than <strong>undefined method `name' for nil:NilClass</strong> which I had previously been receiving. </p> <p>I have also checked and re-checked the 'has_many'/'belongs_to' relationships between <code>chapter</code> and <code>university</code> as well as <code>chapter</code> and <code>foo</code> and found the working and non-working relationships to be identical. I have even gone so far as to switch the order in which those relationships are declared within the models, to no effect.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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