Create a repository app for documents, first step

ram/repository/models.py

@@ -0,0 +1,59 @@
+from django.db import models
+
+from tinymce import models as tinymce
+
+from ram.models import Document
+from metadata.models import Decoder, Tag
+from roster.models import RollingStock
+from bookshelf.models import BaseBook
+
+
+class GenericDocument(Document):
+    notes = tinymce.HTMLField(blank=True)
+    tags = models.ManyToManyField(Tag, blank=True, related_name="new_document")
+
+    class Meta:
+        verbose_name_plural = "Generic Documents"
+
+
+class DecoderDocument(Document):
+    decoder = models.ForeignKey(
+        Decoder, on_delete=models.CASCADE, related_name="new_document"
+    )
+
+    # class Meta:
+    #     constraints = [
+    #         models.UniqueConstraint(
+    #             fields=["decoder", "file"],
+    #             name="unique_decoder_file"
+    #         )
+    #     ]
+
+
+class BaseBookDocument(Document):
+    book = models.ForeignKey(
+        BaseBook, on_delete=models.CASCADE, related_name="new_document"
+    )
+
+    # class Meta:
+    #     verbose_name_plural = "Documents"
+    #     constraints = [
+    #         models.UniqueConstraint(
+    #             fields=["book", "file"],
+    #             name="unique_book_file"
+    #         )
+    #     ]
+
+
+class RollingStockDocument(Document):
+    rolling_stock = models.ForeignKey(
+        RollingStock, on_delete=models.CASCADE, related_name="new_document"
+    )
+
+    # class Meta:
+    #     constraints = [
+    #         models.UniqueConstraint(
+    #             fields=["rolling_stock", "file"],
+    #             name="unique_stock_file"
+    #         )
+    #     ]