usage/article/models.py at 5fd7686d8969027127237f551209a62b7a264e11 · pitangainnovare/usage · GitHub

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from django.db import models
from django.utils.translation import gettext_lazy as _

from core.models import CommonControlField
from collection.models import Collection


class Article(CommonControlField):
    collection = models.ForeignKey(
        Collection,
        verbose_name=_('Collection'),
        on_delete=models.CASCADE,
        blank=False,
        null=False,
        db_index=True,
    )

    scielo_issn = models.CharField(
        verbose_name=_('SciELO ISSN'),
        max_length=9,
        blank=False,
        null=False,
        db_index=True,
    )

    pid_v2 = models.CharField(
        verbose_name=_('PID V2'),
        max_length=23,
        blank=False,
        null=False,
        db_index=True,
    )

    pid_v3 = models.CharField(
        verbose_name=_('PID V3'),
        max_length=23,
        blank=True,
        null=True,
        db_index=True,
    )

    pid_generic = models.CharField(
        verbose_name=_('PID Generic'),
        max_length=50,
        blank=True,
        null=True,
        db_index=True,
    )

    files = models.JSONField(
        verbose_name=_('Files'),
        null=True,
        blank=True,
        default=dict,
    )

    default_lang = models.CharField(
        verbose_name=_('Default Language'),
        max_length=2,
        blank=False,
        null=False,
    )

    text_langs = models.JSONField(
        verbose_name=_('Text Languages'),
        null=True,
        blank=True,
        default=dict,
    )

    processing_date = models.CharField(
        verbose_name=_('Processing Date'),
        max_length=32,
        null=False,
        blank=False,
    )

    publication_date = models.CharField(
        verbose_name=_('Publication Date'),
        max_length=32,
        null=False,
        blank=False,
    )

    publication_year = models.CharField(
        verbose_name=_('Publication Year'),
        max_length=4,
        null=False,
        blank=False,
        db_index=True,
    )

    def __str__(self):
        return f'{self.collection.acron3} - {self.scielo_issn} - {self.pid_v2 or self.pid_v3 or self.pid_generic}'

    @classmethod
    def metadata(cls, collection=None):
        qs = cls.objects.select_related('collection').only(
            'collection__acron3',
            'default_lang',
            'files',
            'pid_v2',
            'pid_v3',
            'pid_generic',
            'processing_date',
            'publication_date',
            'publication_year',
            'scielo_issn',
            'text_langs',
        )

        if collection:
            qs = qs.filter(collection=collection)

        for a in qs.iterator():
            yield {
                'collection': a.collection.acron3,
                'default_lang': a.default_lang,
                'files': a.files,
                'pid_v2': a.pid_v2,
                'pid_v3': a.pid_v3,
                'pid_generic': a.pid_generic,
                'processing_date': a.processing_date,
                'publication_date': a.publication_date,
                'publication_year': a.publication_year,
                'scielo_issn': a.scielo_issn,
                'text_langs': a.text_langs,
            }

    class Meta:
        verbose_name = _('Article')
        verbose_name_plural = _('Articles')
        unique_together = (
            'collection',
            'scielo_issn',
            'pid_v2',
            'pid_v3',
            'pid_generic',
        )
        indexes = [
            models.Index(fields=['collection', 'scielo_issn'], name='collection_scielo_issn_idx'),
        ]