How to run python script in a django class-based view?

Question

My Django app models.py has the following class:

class Project(models.Model):
    name = models.CharField(max_length=100)
    ...

I am using class-based views so my views.py file has the following class:

from django.views import generic
from django.views.generic.edit import CreateView

class ProjectCreate(CreateView):
    model = Project
    fields = ['name']

The HTTP form works perfectly and creates a new element in the database, but I need to call a function from an external python file upon the creation of a new instance of the class Project, the code I'm trying to run is:

import script
script.foo(self.object.name)

I'm trying to run the function foo inside the class ProjectCreate but I'm clueless, I tried using get and dispatch methods but it didn't work, I have read the documentation of CreateView but I couldn't find my answer.

Should I use function-based views? or is there a solution for class-based views?

Thank you very much.

Daniel Roseman · Accepted Answer · 2017-07-31 16:19:02Z

You probably want to do this inside the model save method, rather than in the view, so it will be called whenever a new instance is created:

class Project(models.Model):
    ...
    def save(self, *args, **kwargs):
        if not self.pk:
            script.foo(self)
        return super(Project, self).save(*args, **kwargs)

If you're sure you only want to do it from that one view, then you could override the view's form_valid method instead:

class ProjectCreate(CreateView):
    def form_valid(self, form):
        response = super(ProjectCreate, self).form_valid(form)
        script.foo(self.object)
        return response

Anton Shurashov · Accepted Answer · 2017-07-31 16:18:39Z

0

If you want to run your function only inside the view class you can simply override a form_valid method:

class ProjectCreate(CreateView):
    model = Author
    fields = ['name']

    def form_valid(self, form):
        result = super().form_valid(form)
        script.foo(self.object.name)
        return result

If you want to run the function after an every instance creation you can use signals or override model methods.

answered Jul 31, 2017 at 16:18

Anton Shurashov

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1 Comment

rand Over a year ago

Thank you, this solved the problem. but overriding the save() function in the model class seems like a better solution. Thank you again.

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