v0.2 Preview: Construction Plan.

backend/latex_lab/serializers.py

@@ -0,0 +1,28 @@
+from rest_framework import serializers
+
+from .models import FormulaDocument, FormulaRevision
+
+
+class FormulaDocumentSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = FormulaDocument
+        fields = ("id", "title", "source", "created_at", "updated_at")
+        read_only_fields = ("id", "created_at", "updated_at")
+
+    def validate_source(self, value):
+        if len(value) > 50_000:
+            raise serializers.ValidationError("公式源码不能超过 50000 个字符")
+        return value
+
+    def create(self, validated_data):
+        document = FormulaDocument.objects.create(
+            user=self.context["request"].user,
+            **validated_data,
+        )
+        FormulaRevision.objects.create(document=document, source=document.source)
+        return document
+
+    def update(self, instance, validated_data):
+        instance = super().update(instance, validated_data)
+        FormulaRevision.objects.create(document=instance, source=instance.source)
+        return instance