phase 1 backup - support for multi-file versioned upload

nonpacks/library/models.py

@@ -201,12 +201,9 @@ class TagList(models.Model):
 
 
 class Version(models.Model):
-    """A tracked-file release. Every upload is stored; latest = newest created_at."""
+    """A release holding one or more VersionFile entries. Latest = newest."""
     project = models.ForeignKey(Project, on_delete=models.CASCADE, related_name='versions')
     version_name = models.CharField(max_length=64)
-    file = models.ForeignKey(
-        FileIndex, on_delete=models.SET_NULL, null=True, blank=True, related_name='project_version',
-    )
     changelog = models.TextField(blank=True, default='')
     downloads = models.PositiveIntegerField(default=0)
     created_at = models.DateTimeField(auto_now_add=True)
@@ -218,6 +215,39 @@ class Version(models.Model):
         return f'{self.project.title} {self.version_name}'
 
 
+class VersionFile(models.Model):
+    """One file belonging to a Version release. A version can hold several
+    files (e.g. multiple skins), each with its own download."""
+    KIND_CHOICES = [
+        ('release', 'Release'),
+        ('markdown', 'Markdown'),
+        ('png', 'PNG'),
+    ]
+    version = models.ForeignKey(Version, on_delete=models.CASCADE, related_name='files')
+    file = models.ForeignKey(FileIndex, on_delete=models.CASCADE, related_name='version_file')
+    kind = models.CharField(max_length=16, choices=KIND_CHOICES, default='release')
+    note = models.CharField(max_length=255, blank=True, default='')
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        ordering = ['created_at', 'pk']
+
+    def __str__(self):
+        return f'{self.version} — {self.file.original_filename}'
+
+    @property
+    def filename(self):
+        return self.file.original_filename
+
+    @property
+    def is_markdown(self):
+        return self.kind == 'markdown'
+
+    @property
+    def is_png(self):
+        return self.kind == 'png'
+
+
 class ProjectAsset(models.Model):
     """Untracked gallery media (image/video/gif) displayed on the project page."""
     project = models.ForeignKey(Project, on_delete=models.CASCADE, related_name='assets')