17.5.5 Overriding Methods (in NewsLinkDelete)
In Chapter 18, we’ll change the URL pattern for NewsLinkUpdate and NewsLinkDelete to use NewsLink’s new SlugField. For now, we keep the URL pattern as is. This allows for the demonstration of a GCBV that uses pk instead of a SlugField (see next chapter), as well as a GCBV that requires a method to be overridden (right now!).
In most cases, GCBVs can be subclassed by overriding only attributes. However, for some, method overrides are mandatory. GCBV functionality is split up according to behavior (similar to how we split our custom DetailView in Section 17.2.3), making method overrides almost as straightforward as attribute overrides.
In StartupDelete and TagDelete, we were able to set the success_url ...
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