Django REST frameworkを使ったときに名前が番号になる

今、Djangoを練習していてDjangoとReactを使ってサイトを作っているのですが下記のようなコードで実行するとprojectの名前を表示したいのに番号が出てきてしまいます。（下記画像）
Djangoのadminではreturn self.project.nameと設定しているのでちゃんと日本語でプロジェクト名が表示されるのですが、Reactだとprojectだと数字、project.nameだと何も表示されなくなってしまいます。
大変わかりにくい説明で申し訳ないのですが、詳しい方教えていただけると幸いです。

Backend（Django）

models.py

Django
1from django.db import models
2from django.utils import timezone
3from django.conf import settings
4
5class Category(models.Model):
6    COLOR_CHOICE =( 
7        ('#039BE5','SkyBlue'),
8        ('#4766ea','Blue'),
9        ('#F6BF26','Yellow'),
10        ('#2da608','Green'),
11        ('#D50000','Red'),
12        ('#FF9800','orange'),
13        ('#d84182','Pink'),
14        ('#bf7000','Brown'),
15        ('#7427e8','Purple'),
16        ('#616161','Gray'),
17        ('#000000','Black'),
18    )
19    name = models.CharField(max_length=255)
20    author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
21    color = models.CharField(choices=COLOR_CHOICE, max_length=100)
22    created_at = models.DateTimeField(auto_now_add=True)
23
24    def __str__(self):
25        return self.name
26    
27class Project(models.Model):
28    category = models.ForeignKey(Category, on_delete=models.PROTECT)
29    name = models.CharField(max_length=255)
30    timestamp = models.DateTimeField(auto_now_add=True)
31
32    def __str__(self):
33        return self.name
34
35class Record(models.Model):
36    project = models.ForeignKey(Project, on_delete=models.PROTECT)
37    time = models.DurationField()
38    timestamp = models.DateTimeField(auto_now_add=True)
39
40    def __str__(self):
41        return self.project.name
42

views.py

Django
1from django.shortcuts import render
2from rest_framework import generics
3from .models import Record
4from .serializers import RecordSerializer
5
6
7class ListRecord(generics.ListAPIView):
8    queryset = Record.objects.all()
9    serializer_class = RecordSerializer
10
11
12class DetailRecord(generics.RetrieveAPIView):
13    queryset = Record.objects.all()
14    serializer_class = RecordSerializer

serializers.py

Django
1from rest_framework import serializers
2from .models import Category, Project, Record
3
4class CategorySerializer(serializers.ModelSerializer):
5    class Meta:
6        model = Category
7        fields = ('id','name','author','color','created_at',)
8
9class ProjectSerializer(serializers.ModelSerializer):
10    class Meta:
11        model = Project
12        fields = ('id','category','name','timestamp',)
13
14class RecordSerializer(serializers.ModelSerializer):
15    class Meta:
16        model = Record
17        fields = ('id','project','time','timestamp',)

urls.py

Django
1from django.urls import path
2
3from .views import ListRecord, DetailRecord
4
5urlpatterns = [
6    path('<int:pk>/', DetailRecord.as_view()),
7    path('', ListRecord.as_view()),
8]

##Frontend(React)
App.js

React
1import React, { Component } from 'react';
2import axios from 'axios';
3
4class App extends Component {
5  state = {
6    record: []
7  };
8
9  componentDidMount() {
10    this.getRecord();
11  }
12
13  getRecord() {
14    axios
15        .get('http://127.0.0.1:8000/api/')
16        .then(res => {
17            this.setState({ record: res.data });
18        })
19        .catch(err => {
20            console.log(err);
21        });
22}
23  render() {
24    return (
25        <div>
26            {this.state.record.map(item => (
27                 <div key={item.id}>
28                    <h1>{item.project}</h1>
29                    <p>{item.time}</p>
30                 </div>
31            ))}
32        </div>
33    );
34  }
35}
36
37
38export default App;