0001_create_verification_basis.py

# Generated by Django 5.0.9 on 2025-05-09 15:55

import django.db.models.deletion
import taggit.managers
from django.db import migrations, models
from django.utils.text import slugify


class Migration(migrations.Migration):

    dependencies = []

    operations = [
        migrations.CreateModel(
            name="VerificationBasis",
            fields=[
                (
                    "id",
                    models.AutoField(
                        auto_created=True,
                        primary_key=True,
                        serialize=False,
                        verbose_name="ID",
                    ),
                ),
                (
                    "name",
                    models.CharField(max_length=255, unique=True, verbose_name="name"),
                ),
                (
                    "slug",
                    models.SlugField(
                        allow_unicode=True,
                        max_length=255,
                        unique=True,
                        verbose_name="slug",
                    ),
                ),
            ],
            options={
                "verbose_name": "Basis for verification",
                "verbose_name_plural": "Bases for verification",
            },
        ),
    ]

0002_verification_basis_permissions.py

# Generated by Django 5.0.9 on 2025-05-09 15:55

import django.db.models.deletion
import taggit.managers
from django.db import migrations, models
from django.utils.text import slugify


class Migration(migrations.Migration):
    def verification_bases_permissions(apps, schema_editor):
        pr_perms_codenames = [
            "add_verificationbasis",
            "change_verificationbasis",
            "view_verificationbasis",
            "delete_verificationbasis"
        ]
        pr_perms = Permission.objects.filter(codename__in=pr_perms_codenames)
        admin, _ = Group.objects.get_or_create(name="admin")
        admin.permissions.add(*pr_perms)
  
   dependencies = [
        ("accounts", "0001_create_verification_basis"),
   ]

    operations = [
        migrations.RunPython(verification_bases_permissions),
    ]

__VerificationBasis.py

from django_mysql.models import EnumField
from django.utils.translation import gettext_lazy as _
from django.utils.translation import pgettext_lazy
from django.utils.safestring import mark_safe
from taggit import models as tag_models


class VerificationBasis(tag_models.TagBase):
    """
    A model representing reasons why a provider would be verified.
    This includes things like

        "We use 100% green energy from our own infrastructure.",
        "We operate in a region that has a grid intensity of less than 20g CO2e/kWh or uses over 99% renewable power.",
        "We directly pay for green energy to cover the non-green energy we use.",
        "We purchase quality carbon offsets to cover the non-green energy we use.",
        "We resell or actively use a provider that is already in the Green Web Dataset.",

    A subclass of Taggit's 'TagBase' model.

    """


    # Annoyingly, the only way to override the max_length in taggit appears to be to copy and adjust
    # these two field definitions wholesale: https://github.com/jazzband/django-taggit/issues/510
    name = models.CharField(
        verbose_name=pgettext_lazy("A tag name", "name"), unique=True, max_length=255
    )


    slug = models.SlugField(
        verbose_name=pgettext_lazy("A tag slug", "slug"),
        unique=True,
        max_length=255,
        allow_unicode=True,
    )

    required_evidence_link = models.URLField(
        max_length=255, null=True, blank=True,
        verbose_name="Required evidence link"
    )

    class Meta:
        verbose_name = _("Basis for verification")
        verbose_name_plural = _("Bases for verification")

    @property
    def label(self):
        label = self.name
        if self.required_evidence_link is not None and self.required_evidence_link.strip() != "":
            label += f" (<a href='{self.required_evidence_link}' target='_blank'>see required evidence</a>)"
        return mark_safe(label)