practise around renaming fields, foreign key, bulk re-name

[Andy922]

Hi, I'd like to ask how you amend your field names.

I have encountered two "problems" I'd like to ask about.

A. Is there a function to quickly re-name model-fields in bulk?

B. How do you re-name a foreign-key?

I assume that 95% of all users change the field names, as the python convention is different to that of e.g. json, and that internal model representation is normally not very user friendly.

I have tried on my own, but soon end up in a conclusion that I am totally wrong about the task, when starting to work with completely re-writing over 100 field names within the serializer when I just want to rename it for the user.

e.g. if I have an internal model fieldname called RTF_44534_PB =

models.DecimalField(decimal_places=2, max_digits=5, blank=True, null=True)

I re-write it as

Length = serializers.DecimalField(decimal_places=2, max_digits=5,

source="RTF_44534_PB")

If it would exist a serializer field on the form:, Length = serializers.ModelField(RTF_44534_PB), would considerable speed up everything and minimize any potential mismatches.

This manual method works on all fields but when I come to a foreginkey, I cannot find how to re-name that field in a similar way. How do yo re-name a foreign key?

Many thanks

Andy

[Andy922]

I managed to get this to work, perhaps a suggested improvement is to re-write this into an "easier" syntax on the same form as other serializer fields.

Model is called "Product"

Length = serializers.ModelField(model_field=Product()._meta.get_field('RTF_44534_PB'), source='RTF_44534_PB')

[Matemática A3K]

On Fri, Oct 16, 2020 at 6:17 AM Andy922 <zeros...@gmail.com> wrote:

I managed to get this to work, perhaps a suggested improvement is to re-write this into an "easier" syntax on the same form as other serializer fields.

Model is called "Product"

Length = serializers.ModelField(model_field=Product()._meta.get_field('RTF_44534_PB'), source='RTF_44534_PB')

A quick draft (without error handling) could be:

from django.apps import apps
from rest_framework import serializers

class SModelField(serializers.ModelField):

    def __init__(self, *args, **kwargs):
        if isinstance(kwargs['model_field'], str):
            app_label, model, field = kwargs['model_field'].split(".")
            Model = apps.get_model(app_label, model)
            kwargs['model_field'] = Model()._meta.get_field(field)
        super().__init__(*args, **kwargs)

then you'll "Length = SModelField(model_field="product_app.Product.RTF_44534_PB")" and should work :)

On Friday, October 16, 2020 at 10:50:22 AM UTC+1 Andy922 wrote:

Hi, I'd like to ask how you amend your field names.

I have encountered two "problems" I'd like to ask about.

A. Is there a function to quickly re-name model-fields in bulk?

B. How do you re-name a foreign-key?

I assume that 95% of all users change the field names, as the python convention is different to that of e.g. json, and that internal model representation is normally not very user friendly.

I have tried on my own, but soon end up in a conclusion that I am totally wrong about the task, when starting to work with completely re-writing over 100 field names within the serializer when I just want to rename it for the user.

e.g. if I have an internal model fieldname called RTF_44534_PB =

models.DecimalField(decimal_places=2, max_digits=5, blank=True, null=True)

I re-write it as

Length = serializers.DecimalField(decimal_places=2, max_digits=5,

source="RTF_44534_PB")

If it would exist a serializer field on the form:, Length = serializers.ModelField(RTF_44534_PB), would considerable speed up everything and minimize any potential mismatches.

This manual method works on all fields but when I come to a foreginkey, I cannot find how to re-name that field in a similar way. How do yo re-name a foreign key?

Many thanks

Andy

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