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Depending on the results you are looking for, there are multiple ways to solve this:
1. Use CreateView and UpdateView
Django already provides some classes that render a form for your model, submit it using POST, and re-render the form with errors if form validation was not successful.
Check the generic editing views documentation.
2. Override get_context_data
In LandingView, override TemplateView‘s get_context_data method, so that your context includes the form you are creating in create2.
3. Use FormView
If you still want to use your own defined form instead of the model form that CreateView and UpdateView generate for you, you can use FormView, which is pretty much the same as TemplateView except it also handles your form submission/errors automatically.
In any case, you can keep your search function inside the class-based view and call it from get_context_data to include its results in the template’s context.