后端比赛和比赛题目的部分，还有要增加和修改的地方

contest/serializers.py

@@ -0,0 +1,95 @@
+# coding=utf-8
+import json
+from rest_framework import serializers
+
+from account.models import User
+from .models import Contest, ContestProblem
+
+
+class CreateContestSerializer(serializers.Serializer):
+    title = serializers.CharField(max_length=40)
+    description = serializers.CharField(max_length=5000)
+    mode = serializers.IntegerField()
+    show_rank = serializers.BooleanField()
+    password = serializers.CharField(max_length=30, required=False)
+    start_time = serializers.DateTimeField()
+    end_time = serializers.DateTimeField()
+
+
+class ContestSerializer(serializers.ModelSerializer):
+    class UserSerializer(serializers.ModelSerializer):
+        class Meta:
+            model = User
+            fields = ["username"]
+
+    created_by = UserSerializer()
+
+    class Meta:
+        model = Contest
+
+
+class EditContestSerializer(serializers.Serializer):
+    title = serializers.CharField(max_length=40)
+    description = serializers.CharField(max_length=10000)
+    mode = serializers.IntegerField()
+    show_rank = serializers.BooleanField()
+    password = serializers.CharField(max_length=30, required=False)
+    start_time = serializers.DateTimeField()
+    end_time = serializers.DateTimeField()
+
+
+class ContestProblemSampleSerializer(serializers.ListField):
+    input = serializers.CharField(max_length=3000)
+    output = serializers.CharField(max_length=3000)
+
+
+class JSONField(serializers.Field):
+    def to_representation(self, value):
+        return json.loads(value)
+
+
+class CreateContestProblemSerializer(serializers.Serializer):
+    title = serializers.CharField(max_length=50)
+    description = serializers.CharField(max_length=10000)
+    input_description = serializers.CharField(max_length=10000)
+    output_description = serializers.CharField(max_length=10000)
+    # [{"input": "1 1", "output": "2"}]
+    samples = ContestProblemSampleSerializer()
+    test_case_id = serializers.CharField(max_length=40)
+    time_limit = serializers.IntegerField()
+    memory_limit = serializers.IntegerField()
+    difficulty = serializers.IntegerField()
+    hint = serializers.CharField(max_length=3000, allow_blank=True)
+    sort_index = serializers.CharField(max_length=30)
+
+
+class ContestProblemSerializer(serializers.ModelSerializer):
+    samples = JSONField()
+
+    class ContestSerializer(serializers.ModelSerializer):
+        class Meta:
+            model = Contest
+            fields = ["title"]
+
+    created_by = ContestSerializer()
+
+    class Meta:
+        model = ContestProblem
+
+
+class EditContestProblemSerializer(serializers.Serializer):
+    id = serializers.IntegerField()
+    title = serializers.CharField(max_length=50)
+    description = serializers.CharField(max_length=10000)
+    input_description = serializers.CharField(max_length=10000)
+    output_description = serializers.CharField(max_length=10000)
+    test_case_id = serializers.CharField(max_length=40)
+    time_limit = serializers.IntegerField()
+    memory_limit = serializers.IntegerField()
+    difficulty = serializers.IntegerField()
+    samples = ContestProblemSampleSerializer()
+    hint = serializers.CharField(max_length=3000, allow_blank=True)
+    visible = serializers.BooleanField()
+    sort_index = serializers.CharField(max_length=30)
+
+