mirror of
https://github.com/magnum-opus-nn-cp/backend.git
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80 lines
2.5 KiB
Python
80 lines
2.5 KiB
Python
from django.db import models
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from press_release_nl.common.signals import (
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create_cropped_model_image,
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delete_cropped_model_image,
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update_cropped_model_image,
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)
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from press_release_nl.utils.files import user_file_upload_mixin
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from press_release_nl.utils.generators import generate_charset
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class BaseImageModel(models.Model):
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"""
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stores user's images in their media folder, creates, updates and deletes preview
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"""
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image = models.ImageField(upload_to=user_file_upload_mixin, blank=True)
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image_cropped = models.ImageField(upload_to="cropped/", blank=True)
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@classmethod
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def __init_subclass__(cls, **kwargs):
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super().__init_subclass__(**kwargs)
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models.signals.pre_save.connect(update_cropped_model_image, sender=cls)
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models.signals.post_save.connect(create_cropped_model_image, sender=cls)
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models.signals.post_delete.connect(delete_cropped_model_image, sender=cls)
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class Meta:
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abstract = True
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def create_model_slug(sender, instance, **kwargs):
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def _generate_charset():
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if private:
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return generate_charset(private_slug_length)
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return generate_charset(slug_length)
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if instance.id is None:
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model = sender
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slug_length = 5
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private_slug_length = 20
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private = False
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if hasattr(model, "SlugMeta"):
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if hasattr(model.SlugMeta, "slug_length"):
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slug_length = model.SlugMeta.slug_length
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if hasattr(model.SlugMeta, "private_slug_length"):
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private_slug_length = model.SlugMeta.private_slug_length
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if hasattr(instance, "private"):
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if instance.private:
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private = True
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if hasattr(instance, "public"):
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if not instance.public:
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private = True
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slug = _generate_charset()
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while model.objects.filter(slug=slug).exists():
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slug = _generate_charset()
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instance.slug = slug
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class SlugModel(models.Model):
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"""
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model to store and generate slug for model instances
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for custom slug length use: slug_length, private_slug_length SlugMeta options
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"""
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slug = models.SlugField(max_length=20, blank=True, unique=True)
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@classmethod
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def __init_subclass__(cls, **kwargs):
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super().__init_subclass__(**kwargs)
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models.signals.pre_save.connect(create_model_slug, sender=cls)
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class Meta:
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abstract = True
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class SlugMeta:
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slug_length = 5
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private_slug_length = 20
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