如何从 django-import-export 获取文件？

Question

I want to use groupby() function from pandas, but dont know how to get file before export. I've tried dehydrate, but I dont think it's what i want.

    phone = Field()
    class Meta:
        model = Phones
        # exclude = ('id', )
    def dehydrate_url(self,phone):

Answer 1

If you need to get hold of the file data before import, it is easy, just use the before_import() method:

This needs to be declared in your Resource, for example:

class BookResource(resources.ModelResource):

    def before_import(self, dataset, using_transactions, dry_run, **kwargs):
        for row in dataset.dict:
            print(row)