django序列化serializers過程解析

更新時(shí)間：2019年12月14日 09:33:27 作者：pfeiliu

這篇文章主要介紹了django序列化serializers過程解析,文中通過示例代碼介紹的非常詳細(xì)，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

DRF的核心就是前后端分離的核心

前后端分離開發(fā)的核心：

將模型轉(zhuǎn)換為json 稱之為序列化
將json轉(zhuǎn)換為模型稱之為反序列化

Django的序列化工具讓你可以將Django的模型‘翻譯'成其它格式的數(shù)據(jù)。通常情況下，這種其它格式的數(shù)據(jù)是基于文本的，并且用于數(shù)據(jù)交換\傳輸過程。

序列化數(shù)據(jù)

Django為我們提供了一個(gè)強(qiáng)大的序列化工具serializers。使用它也很簡單，如下所示：

from django.core import serializers
data = serializers.serialize("xml", SomeModel.objects.all())

data = serializers.serialize("json", Author.objects.all())
print(data)

[{"model": "index.author", "pk": 1, "fields": {"name": "pfeiliu", "age": 19, "email": "789@163.com", "isActive": false}}, {"model": "index.author", "pk": 5, "fields": {"name": "lao wei", "age": 18, "email": "123@qq.com", "isActive": true}}, {"model": "index.author", "pk": 6, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 7, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 8, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 9, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 10, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 11, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 12, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 13, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}, {"model": "index.author", "pk": 14, "fields": {"name": "WangDB", "age": 36, "email": "wangdb@163.com", "isActive": false}}]

首先，從djang.core導(dǎo)入它，然后調(diào)用它的serialize方法，這個(gè)方法至少接收兩個(gè)參數(shù)，第一個(gè)是你要序列化成為的數(shù)據(jù)格式，這里是‘xml'，第二個(gè)是要序列化的數(shù)據(jù)對象，數(shù)據(jù)通常是ORM模型的QuerySet，一個(gè)可迭代的對象。

就是這么簡單??！

序列化指定字段

如果你不想序列化模型對象所有字段的內(nèi)容，只想序列化某些指定的字段，可以使用fields參數(shù)，如下所示：

from django.core import serializers
data = serializers.serialize('xml', SomeModel.objects.all(), fields=('name','size'))

data = serializers.serialize("json", Author.objects.all(),fields=('name','age'))
print(data)

[{"model": "index.author", "pk": 1, "fields": {"name": "pfeiliu", "age": 19}}, {"model": "index.author", "pk": 5, "fields": {"name": "lao wei", "age": 18}}, {"model": "index.author", "pk": 6, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 7, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 8, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 9, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 10, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 11, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 12, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 13, "fields": {"name": "WangDB", "age": 36}}, {"model": "index.author", "pk": 14, "fields": {"name": "WangDB", "age": 36}}]

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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