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    <p>(Bit late to this one, but I have been through the same issues myself, so using this as a note_to_self as much as anything.)</p> <p>You can specify <code>error_messages</code> on both models and modelforms. The keys you should / can use are defined <a href="https://docs.djangoproject.com/en/dev/ref/forms/fields/#built-in-field-classes" rel="nofollow">here</a> for the form fields. The issue seems to be (to me) the inter-relationship between forms and the related model, and which error message appears, and when. The key to this is understanding that forms and models are actually very loosely-coupled, and that there really is no magic happening. </p> <p>If you have a model field called 'quote', with a max_length of 140, and a modelform associated with this model, the error messages will work thus:</p> <ul> <li>If you don't <em>explicitly</em> add a max_length attribute to the modelform, and then validate the form (calling <code>is_valid()</code> or <code>errors</code>), the error message that comes back will be from the model.</li> <li>If you add a set of error_messages ('required','max_length') to the model, these will appear in the errors collection. </li> <li>If you add a set of error_messages to the modelform, they will not appear, as it is the model that is failing validation, not the form.</li> <li>If you then add a max_length attribute to the modelform, you will see the modelform errors surfacing (and overriding the model error_messages.)</li> </ul> <p>So - fairly simple in summary - the error messages map to the object that is being validated - which can be either the model or the modelform.</p>
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    1. USHugo Rodger-Brown
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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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