models.py

from django.db import models


class Contact(models.Model):
    email = models.EmailField(max_length=254, blank=True, null=True)
    name = models.CharField(max_length=80, blank=True, null=True)
    notes = models.TextField(blank=True)

    def __str__(self):
        name = self.name if self.name else ''
        email = self.email if self.email else ''
        return str(f"{name} {email}").strip()


class Campus(models.Model):
    name = models.CharField(max_length=40, unique=True, verbose_name="Campus")
    notes = models.TextField(blank=True)

    class Meta:
        verbose_name_plural = "Campuses"

    def __str__(self):
        return str(self.name)


class Subject(models.Model):
    name = models.CharField(max_length=40, unique=True, verbose_name="Subject")
    notes = models.TextField(blank=True)

    def __str__(self):
        return str(self.name)


class PublicationType(models.Model):
    name = models.CharField(max_length=40, verbose_name="Publication Type")
    notes = models.TextField(blank=True)

    def __str__(self):
        return str(self.name)


class PublishingProgram(models.Model):
    # unit with a publishing activity
    name = models.CharField(
        max_length=254,
        blank=True,
        help_text="unit hosting program",
        verbose_name="Unit",
    )
    notes = models.TextField(blank=True)
    campus = models.ManyToManyField(Campus, blank=True)

    def __str__(self):
        return str(self.name)


class Project(models.Model):
    ESCHOLARSHIP = "E"
    UCPRESS = "U"
    OTHER = "O"
    SELFPUBLISHED = "S"
    PLATFORM_CHOICES = [
        (ESCHOLARSHIP, "eScholarship"),
        (UCPRESS, "UC Press"),
        (OTHER, "Other"),
        (SELFPUBLISHED, "Self-Published"),
    ]
    program = models.ForeignKey(
        PublishingProgram, verbose_name="Unit with activity", on_delete=models.PROTECT)
    publication_name = models.CharField(
        max_length=200, help_text="name of the publication", blank=True,
    )
    publication_type = models.ForeignKey(PublicationType, blank=True, on_delete=models.PROTECT)
    platform = models.CharField(max_length=1, choices=PLATFORM_CHOICES, default=OTHER,)
    publishing_partner = models.CharField(max_length=200, blank=True,)

    url = models.URLField(blank=True)
    contact = models.ManyToManyField(Contact, verbose_name="Contact", related_name="projects", blank=True)
    subject = models.ManyToManyField(Subject, verbose_name="Subject", blank=True)

    notes = models.TextField(blank=True)

    def __str__(self):
        if self.publication_name:
            name = f"{self.publication_name} ({self.program})"
        else:
            name = f"{self.publication_type} ({self.program})"
        return str(name)