{"id":49885,"date":"2022-12-15T11:41:47","date_gmt":"2023-04-12T09:59:24","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8django%e4%b8%ad%e4%bd%bf%e7%94%a8django-dispatch-receiver%e6%9d%a5%e5%a4%84%e7%90%86%e5%9c%a8%e6%95%b0%e6%8d%ae%e5%88%9b%e5%bb%ba%e5%92%8c%e4%bf%9d%e5%ad%98%e6%97%b6%e8%a7%a6%e5%8f%91\/"},"modified":"2024-04-29T05:22:22","modified_gmt":"2024-04-28T21:22:22","slug":"%e5%9c%a8django%e4%b8%ad%e4%bd%bf%e7%94%a8django-dispatch-receiver%e6%9d%a5%e5%a4%84%e7%90%86%e5%9c%a8%e6%95%b0%e6%8d%ae%e5%88%9b%e5%bb%ba%e5%92%8c%e4%bf%9d%e5%ad%98%e6%97%b6%e8%a7%a6%e5%8f%91","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8django%e4%b8%ad%e4%bd%bf%e7%94%a8django-dispatch-receiver%e6%9d%a5%e5%a4%84%e7%90%86%e5%9c%a8%e6%95%b0%e6%8d%ae%e5%88%9b%e5%bb%ba%e5%92%8c%e4%bf%9d%e5%ad%98%e6%97%b6%e8%a7%a6%e5%8f%91\/","title":{"rendered":"\u5728[Django]\u4e2d\u4f7f\u7528[django.dispatch.receiver]\u6765\u5904\u7406\u5728\u6570\u636e\u521b\u5efa\u548c\u4fdd\u5b58\u65f6\u89e6\u53d1\u7684\u4fe1\u53f7"},"content":{"rendered":"

django.dispatch.receiver()\u7684\u7528\u6cd5\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u6709\u65f6\u5019\u6211\u4eec\u60f3\u8981\u5728\u7279\u5b9a\u7684\u8868\u683c\u6570\u636e\u53d1\u751f\u66f4\u6539\u65f6\u8bb0\u5f55\u65e5\u5fd7\uff0c\u6bd4\u5982\u8bf4\u53ea\u6709\u5f53\u5546\u54c1\u4fe1\u606f\u53d1\u751f\u66f4\u6539\u65f6\u624d\u60f3\u8981\u8bb0\u5f55\u65e5\u5fd7\u3002
\n\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u4fe1\u53f7(signal)\uff01<\/p>\n

 <\/p>\n

Django\u4e2d\u5305\u542b\u4e00\u4e2a\u201c\u4fe1\u53f7\u5206\u53d1\u5668\u201d\uff0c\u5b83\u5e2e\u52a9\u6211\u4eec\u89e3\u8026\u7684\u5e94\u7528\u7a0b\u5e8f\u5728\u6846\u67b6\u7684\u5176\u4ed6\u5730\u65b9\u53d1\u751f\u64cd\u4f5c\u65f6\u5f97\u5230\u901a\u77e5\u3002\u7b80\u800c\u8a00\u4e4b\uff0c\u4fe1\u53f7\u5141\u8bb8\u67d0\u4e9b\u53d1\u9001\u8005\u901a\u77e5\u4e00\u7ec4\u63a5\u6536\u8005\u67d0\u4e2a\u52a8\u4f5c\u5df2\u7ecf\u53d1\u751f\u3002\u5f53\u8bb8\u591a\u4ee3\u7801\u7247\u6bb5\u53ef\u80fd\u5bf9\u76f8\u540c\u4e8b\u4ef6\u611f\u5174\u8da3\u65f6\uff0c\u5b83\u4eec\u7279\u522b\u6709\u7528\u3002<\/p><\/blockquote>\n

\u6211\u4eec\u4e0d\u660e\u767d\u8fd9\u4e2a\u610f\u601d\u5462\u3002\u8ba9\u6211\u4eec\u6765\u770b\u4e2a\u4f8b\u5b50\u5427\u3002<\/p>\n

\u5f53\u4e00\u4e2a\u65b0\u8bb0\u5f55\u88ab\u6dfb\u52a0\u5230\u6570\u636e\u5e93\u4e2d\u65f6\uff0c\u4f1a\u4ea7\u751f\u76f8\u5e94\u7684\u65e5\u5fd7\u548c\u901a\u77e5\u3002<\/h1>\n

\u5982\u679c\u60a8\u4f7f\u7528print\u8fdb\u884c\u8f93\u51fa\uff0c\u5f53\u7136\u60a8\u4e5f\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528logger\u6765\u8fdb\u884c\u65e5\u5fd7\u8bb0\u5f55\uff0c\u8bf7\u8bd5\u4e00\u4e0b\u3002<\/p>\n

from<\/span> django.db.models.signals<\/span> import<\/span> post_save<\/span>\r\nfrom<\/span> django.dispatch<\/span> import<\/span> receiver<\/span>\r\n\r\nfrom<\/span> webtestapp.models<\/span> import<\/span> Product<\/span>\r\n\r\n\r\n@receiver<\/span>(<\/span>post_save<\/span>,<\/span> sender<\/span>=<\/span>Product<\/span>)<\/span>\r\ndef<\/span> create_product<\/span>(<\/span>sender<\/span>,<\/span> instance<\/span>,<\/span> created<\/span>,<\/span> **<\/span>kwargs<\/span>):<\/span>\r\n    print<\/span>(<\/span>'<\/span>\u4f5c\u6210\u6642\u306e\u30c6\u30b9\u30c8<\/span>'<\/span>)<\/span>\r\n    if<\/span> created<\/span>:<\/span>\r\n        print<\/span>(<\/span>'<\/span>[Product]: \u5546\u54c1\u60c5\u5831\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f<\/span>'<\/span>)<\/span>\r\n<\/code><\/pre>\n
from<\/span> django.apps<\/span> import<\/span> AppConfig<\/span>\r\n\r\n\r\nclass<\/span> WebtestappConfig<\/span>(<\/span>AppConfig<\/span>):<\/span>\r\n    default_auto_field<\/span> =<\/span> '<\/span>django.db.models.BigAutoField<\/span>'<\/span>\r\n    name<\/span> =<\/span> '<\/span>webtestapp<\/span>'<\/span>\r\n\r\n    def<\/span> ready<\/span>(<\/span>self<\/span>):<\/span>\r\n        from<\/span> webtestapp<\/span> import<\/span> signals<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728apps.py\u6587\u4ef6\u4e2d\u6dfb\u52a0ready\u3002\u53ea\u9700\u8981\u5bfc\u5165\u5373\u53ef\u9690\u5f0f\u5730\u4f7f\u7528\u5b83\u3002<\/p>\n
\u4f60\u53ef\u4ee5\u8bd5\u8bd5\u5728Django shell\u4e2d\u6267\u884c\u4e00\u4e0b<\/p>\n
>>> from webtestapp.models import Product\r\n>>> Product.objects.create(name='sample', price=100, category='daily', description='\u30b5\u30f3\u30d7\u30eb')\r\n\u4f5c\u6210\u6642\u306e\u30c6\u30b9\u30c8\r\n[Product]: \u5546\u54c1\u60c5\u5831\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\r\n<Product: sample>\r\n<\/code><\/pre>\n
\u5982\u679c\u660e\u786e\u5730\u5199\u4e0b\u6765\u7684\u8bdd<\/h2>\n
\u5728\u4e4b\u524d\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u53ea\u662f\u5c06import\u6807\u8bb0\u4e3aready\u3002\u5982\u679c\u9700\u8981\u660e\u786e\u5199\u51fa\u6765\uff0c\u53ef\u4ee5\u5199\u6210\u4ee5\u4e0b\u5f62\u5f0f\u3002\u6211\u8ba4\u4e3a\u8fd9\u6837\u66f4\u5b89\u5168\u3002<\/p>\n
from<\/span> django.apps<\/span> import<\/span> AppConfig<\/span>\r\nfrom<\/span> django.core.signals<\/span> import<\/span> request_finished<\/span>\r\n\r\nclass<\/span> WebtestappConfig<\/span>(<\/span>AppConfig<\/span>):<\/span>\r\n    default_auto_field<\/span> =<\/span> '<\/span>django.db.models.BigAutoField<\/span>'<\/span>\r\n    name<\/span> =<\/span> '<\/span>webtestapp<\/span>'<\/span>\r\n\r\n    def<\/span> ready<\/span>(<\/span>self<\/span>):<\/span>\r\n        from<\/span> webtestapp<\/span> import<\/span> signals<\/span>\r\n        request_finished<\/span>.<\/span>connect<\/span>(<\/span>signals<\/span>.<\/span>create_product<\/span>)<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u5c06\u8bb0\u5f55\u6dfb\u52a0\u5230\u65f6\uff0c\u540c\u65f6\u521b\u5efa\u5176\u4ed6\u6570\u636e\u3002\u5982\u679c\u662f\u66f4\u65b0\uff0c\u5219\u8bb0\u5f55\u65e5\u5fd7\u3002<\/h1>\n
\u4f8b\u5982\uff0c\u5f53\u521b\u5efa\u4e86\u76f8\u5f53\u91cd\u8981\u7684\u65b0\u6570\u636e\u65f6\uff0c\u5e0c\u671b\u5c06\u5176\u4f5c\u4e3a\u5386\u53f2\u6216\u65e5\u5fd7\u6570\u636e\u4fdd\u5b58\u5728\u53e6\u4e00\u4e2a\u8868\u4e2d\u3002\u5047\u8bbe\u5f53\u53d1\u751f\u66f4\u6539\u65f6\uff0c\u5e0c\u671b\u8fdb\u884c\u65e5\u5fd7\u8bb0\u5f55\u3002apps.py\u4e0e\u793a\u4f8b1\u76f8\u540c\u3002<\/p>\n
from<\/span> django.db.models.signals<\/span> import<\/span> post_save<\/span>\r\nfrom<\/span> django.dispatch<\/span> import<\/span> receiver<\/span>\r\nfrom<\/span> django.forms<\/span> import<\/span> model_to_dict<\/span>\r\n\r\nfrom<\/span> webtestapp.models<\/span> import<\/span> Product<\/span>,<\/span> ProductHistory<\/span>\r\n\r\n@receiver<\/span>(<\/span>post_save<\/span>,<\/span> sender<\/span>=<\/span>Product<\/span>)<\/span>\r\ndef<\/span> create_product<\/span>(<\/span>sender<\/span>,<\/span> instance<\/span>,<\/span> created<\/span>,<\/span> **<\/span>kwargs<\/span>):<\/span>\r\n    data<\/span> =<\/span> model_to_dict<\/span>(<\/span>instance<\/span>,<\/span> fields<\/span>=<\/span>[<\/span>field<\/span>.<\/span>name<\/span> for<\/span> field<\/span> in<\/span> instance<\/span>.<\/span>_meta<\/span>.<\/span>fields<\/span>])<\/span>\r\n    # id\u3092product_id\u306b\u5909\u66f4\r\n<\/span>    data<\/span>[<\/span>'<\/span>product_id<\/span>'<\/span>]<\/span> =<\/span> data<\/span>.<\/span>pop<\/span>(<\/span>'<\/span>id<\/span>'<\/span>)<\/span>\r\n    if<\/span> created<\/span>:<\/span>\r\n        print<\/span>(<\/span>'<\/span>[Product]: \u5546\u54c1\u60c5\u5831\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f<\/span>'<\/span>)<\/span>\r\n        ProductHistory<\/span>.<\/span>objects<\/span>.<\/span>create<\/span>(<\/span>**<\/span>data<\/span>)<\/span>\r\n        print<\/span>(<\/span>'<\/span>\u5c65\u6b74\u3092\u4f5c\u6210<\/span>'<\/span>)<\/span>\r\n    else<\/span>:<\/span>\r\n        print<\/span>(<\/span>'<\/span>[Product]: \u5546\u54c1\u60c5\u5831\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f<\/span>'<\/span>)<\/span>\r\n<\/code><\/pre>\n
>>> from webtestapp.models import Product, ProductHistory\r\n>>> new_p = Product.objects.create(name='sample3', price=300, category='daily', description='\u30b5\u30f3\u30d7\u30eb3')\r\n[Product]: \u5546\u54c1\u60c5\u5831\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\r\n>>> ph = ProductHistory.objects.get(product_id=new_p.id)\r\n>>> ph\r\n<ProductHistory: sample3>\r\n>>> new_p.price = 500\r\n>>> new_p.save()\r\n[Product]: \u5546\u54c1\u60c5\u5831\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f\r\n<\/code><\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u5c06\u65b0\u5efa\u548c\u66f4\u65b0\u7684\u5904\u7406\u5206\u5f00\u4e86\u3002<\/p>\n
\u586b\u8865<\/h2>\n
\u5982\u679c\u6bcf\u6b21\u4fdd\u5b58\u90fd\u4f1a\u8c03\u7528\u5904\u7406\u7684\u8bdd\uff0c\u90a3\u4e48\u53ea\u8981\u4ef7\u683c\u53d1\u751f\u53d8\u5316\u65f6\u624d\u60f3\u8bb0\u5f55\u65e5\u5fd7\u6216\u8c03\u7528\u5904\u7406\uff0c\u53ef\u4ee5\u4f7f\u7528pre_save\u4fe1\u53f7\u6765\u4ece\u6570\u636e\u5e93\u83b7\u53d6\u6570\u636e\uff0c\u7136\u540e\u6bd4\u8f83\u66f4\u65b0\u540e\u7684\u5b9e\u4f8b\u503c\uff0c\u5982\u679c\u4e0d\u540c\u5c31\u8bb0\u5f55\u65e5\u5fd7\u3002(\u5982\u679c\u4fdd\u5b58\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u9519\u8bef\uff0c\u53ef\u80fd\u53ea\u4f1a\u8bb0\u5f55\u65e5\u5fd7)\u3002\u203b pre_save\u4fe1\u53f7\u4f1a\u5728\u5c06\u6570\u636e\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u4e4b\u524d\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
\u8bf7\u6ce8\u610f<\/h2>\n
    \n
  • \n
      queryset\u306eupdate()\u4f7f\u3046\u3068save()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u306a\u3044\u306e\u3067signal\u51e6\u7406\u304c\u52d5\u304d\u307e\u305b\u3093\u3002<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u3068\u3044\u3046\u304b\u3001\u305d\u306e\u4ed6\u306b\u3082update()\u4f7f\u3046\u3068auto_now\u52b9\u304b\u306a\u3044\u3068\u304b\u3042\u308b\u306e\u3067\u4f7f\u7528\u3059\u308b\u3068\u304d\u306b\u306f\u6ce8\u610f\u5fc5\u8981\u3067\u3059\u306d\u3001\u3001<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              model_to_dict\u306f\u9762\u5012\u306a\u66f8\u304d\u65b9\u3057\u3066\u307e\u3059\u304c<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                many_to_many\u306a\u3051\u308c\u3070model_to_dict(instance)\u3067\u826f\u3044\u306f\u305a\u3067\u3059\u3002<\/ul>\n
                \u672c\u6b21\u4f7f\u7528\u7684\u6a21\u578b\u5b9a\u4e49<\/h1>\n
                class<\/span> Product<\/span>(<\/span>models<\/span>.<\/span>Model<\/span>):<\/span>\r\n    CATEGORY<\/span> =<\/span> (<\/span>\r\n            (<\/span>'<\/span>daily<\/span>'<\/span>,<\/span> '<\/span>\u65e5\u7528\u54c1<\/span>'<\/span>),<\/span>\r\n            (<\/span>'<\/span>child<\/span>'<\/span>,<\/span> '<\/span>\u5b50\u4f9b\u5411\u3051<\/span>'<\/span>),<\/span>\r\n            (<\/span>'<\/span>sports<\/span>'<\/span>,<\/span> '<\/span>\u30b9\u30dd\u30fc\u30c4<\/span>'<\/span>),<\/span>\r\n            )<\/span>\r\n\r\n    name<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    price<\/span> =<\/span> models<\/span>.<\/span>IntegerField<\/span>()<\/span>\r\n    category<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>50<\/span>,<\/span> choices<\/span>=<\/span>CATEGORY<\/span>)<\/span>\r\n    description<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>2000<\/span>,<\/span> blank<\/span>=<\/span>True<\/span>)<\/span>\r\n    updated_at<\/span> =<\/span> models<\/span>.<\/span>DateTimeField<\/span>(<\/span>auto_now<\/span>=<\/span>True<\/span>)<\/span>\r\n    created_at<\/span> =<\/span> models<\/span>.<\/span>DateTimeField<\/span>(<\/span>auto_now_add<\/span>=<\/span>True<\/span>,<\/span> null<\/span>=<\/span>True<\/span>)<\/span>\r\n    tags<\/span> =<\/span> models<\/span>.<\/span>ManyToManyField<\/span>(<\/span>Tag<\/span>)<\/span>\r\n\r\n    def<\/span> __str__<\/span>(<\/span>self<\/span>):<\/span>\r\n        return<\/span> self<\/span>.<\/span>name<\/span>\r\n\r\n\r\nclass<\/span> ProductHistory<\/span>(<\/span>models<\/span>.<\/span>Model<\/span>):<\/span>\r\n    CATEGORY<\/span> =<\/span> (<\/span>\r\n            (<\/span>'<\/span>daily<\/span>'<\/span>,<\/span> '<\/span>\u65e5\u7528\u54c1<\/span>'<\/span>),<\/span>\r\n            (<\/span>'<\/span>child<\/span>'<\/span>,<\/span> '<\/span>\u5b50\u4f9b\u5411\u3051<\/span>'<\/span>),<\/span>\r\n            (<\/span>'<\/span>sports<\/span>'<\/span>,<\/span> '<\/span>\u30b9\u30dd\u30fc\u30c4<\/span>'<\/span>),<\/span>\r\n            )<\/span>\r\n\r\n    product_id<\/span> =<\/span> models<\/span>.<\/span>IntegerField<\/span>(<\/span>null<\/span>=<\/span>True<\/span>)<\/span>\r\n    name<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    price<\/span> =<\/span> models<\/span>.<\/span>IntegerField<\/span>()<\/span>\r\n    category<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>50<\/span>,<\/span> choices<\/span>=<\/span>CATEGORY<\/span>)<\/span>\r\n    description<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>2000<\/span>,<\/span> blank<\/span>=<\/span>True<\/span>)<\/span>\r\n    updated_at<\/span> =<\/span> models<\/span>.<\/span>DateTimeField<\/span>(<\/span>auto_now<\/span>=<\/span>True<\/span>)<\/span>\r\n    created_at<\/span> =<\/span> models<\/span>.<\/span>DateTimeField<\/span>(<\/span>auto_now_add<\/span>=<\/span>True<\/span>,<\/span> null<\/span>=<\/span>True<\/span>)<\/span>\r\n\r\n    def<\/span> __str__<\/span>(<\/span>self<\/span>):<\/span>\r\n        return<\/span> self<\/span>.<\/span>name<\/span>\r\n<\/code><\/pre>\n
                \u5728\u5355\u5143\u6d4b\u8bd5\u7b49\u573a\u5408\u8981\u6ce8\u610f\u7684\u4e8b\u9879\u3002<\/h1>\n
                \u5728\u6267\u884c\u5355\u5143\u6d4b\u8bd5\u7b49\u65f6\uff0c\u6709\u53ef\u80fd\u4f1a\u591a\u6b21\u6267\u884c\u76f8\u540c\u7684\u5185\u5bb9\u3002\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u79cd\u60c5\u51b5\uff0c\u636e\u8bf4\u6700\u597d\u7ed9\u4e88\u4e0d\u91cd\u590d\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
                \u963b\u6b62\u91cd\u590d\u4fe1\u53f7<\/p><\/blockquote>\n
                from<\/span> django.core.signals<\/span> import<\/span> request_finished<\/span>\r\n\r\nrequest_finished<\/span>.<\/span>connect<\/span>(<\/span>my_callback<\/span>,<\/span> dispatch_uid<\/span>=<\/span>\"<\/span>my_unique_identifier<\/span>\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
                \u6211\u6ca1\u6709\u8bd5\u8fc7\uff0c\u4f46\u4f60\u53ea\u9700\u8981\u81ea\u5df1\u51b3\u5b9a\u5b57\u7b26\u4e32\u5e76\u5c06\u5176\u4f5c\u4e3adispatch_uid\u53c2\u6570\u4f20\u9012\u5373\u53ef\u3002<\/p>\n
                \u89e3\u91ca\u4f7f\u7528\u8fc7\u7684Signal<\/h1>\n
                \u5bf9\u8fd9\u6b21\u4f7f\u7528\u7684signal\u8fdb\u884c\u7b80\u5355\u89e3\u91ca\u3002<\/p>\n
                \u53d1\u8868\u4fdd\u5b58<\/h2>\n
                \u5728Django\u7684\u6570\u636e\u5e93\u6a21\u578b\u4e2d\uff0cpost_save\u4fe1\u53f7<\/p>\n
                \u5728\u8c03\u7528save\uff08\uff09\u65b9\u6cd5\u4e4b\u540e\u6267\u884c<\/p>\n
                \u53c2\u6570<\/h3>\n
                receiver_function(sender, instance, created, raw, using, update_fields)\r\n<\/code><\/pre>\n
                  \n
                • \n
                    sender:<\/ul>\n<\/li>\n<\/ul>\n
                    \u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u6e21\u3059<\/p>\n
                    instance:<\/p>\n
                    save\u3057\u305f\u30e2\u30c7\u30eb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3002\u4fdd\u5b58\u3057\u305f\u30c7\u30fc\u30bf\u306eID\u4f7f\u3063\u3066\u30ed\u30b0\u51fa\u3059\u3068\u304b\u8272\u3005\u4f7f\u3048\u305d\u3046\u3002<\/p>\n
                    created: boolean<\/p>\n
                    \u30ec\u30b3\u30fc\u30c9\u8ffd\u52a0\u3055\u308c\u305f\u3068\u304d\u306bTrue\u306a\u308b\u3002\u66f4\u65b0\u51e6\u7406\u306e\u6642\u306fFalse\u306a\u306e\u3067\u3088\u304f\u4f7f\u3046\u306f\u305a<\/p>\n
                    raw: boolean<\/p>\n
                    \u30e2\u30c7\u30eb\u304c\u76f4\u3067\u4fdd\u5b58\u3055\u308c\u308b\u5834\u5408 (\u30d5\u30a3\u30af\u30b9\u30c1\u30e3\u3092\u30ed\u30fc\u30c9\u3059\u308b\u3068\u304d\u3068\u304b\uff1f)\u3001True\u3002True\u306e\u6642\u3001DB\u306e\u4ed6\u306e\u30ec\u30b3\u30fc\u30c9\u3044\u3058\u308b\u3068\u554f\u984c\u51fa\u308b\u304b\u3082\u3002<\/p>\n
                    using:<\/p>\n
                    \u4f7f\u7528\u3055\u308c\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30a4\u30ea\u30a2\u30b9<\/p>\n
                    update_fields:<\/p>\n
                    \u66f4\u65b0\u3055\u308c\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u3002save()\u306b\u6e21\u3057\u305f\u5f15\u6570\u3064\u307e\u308a\u66f4\u65b0\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5165\u308b\u3002\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u66f4\u65b0\u3055\u308c\u305f\u3089\u30ed\u30b0\u51fa\u3057\u305f\u3044\u3068\u304b\u3067\u3002
                    \n\u66f4\u65b0\u306e\u6642\u306b\u30d5\u30a3\u30fc\u30eb\u30c9\u4f55\u3082\u6e21\u3055\u306a\u304b\u3063\u305f\u5834\u5408\u306fNone\u306b\u306a\u308b\u3002instace.save()\u307f\u305f\u3044\u306b\u5168\u90e8\u4fdd\u5b58\u3059\u308b\u3068None\u306b\u306a\u308b\u306e\u3067\u4f7f\u3044\u306b\u304f\u3044\u304b\u3082\u3002<\/p>\n
                    \u5173\u4e8eupdate_fields\u7684\u8865\u5145\u8bf4\u660e<\/h4>\n
                    \u6211\u5c06\u5c1d\u8bd5\u6253\u5370update_fields\u7684\u6570\u636e\u3002<\/p>\n
                    >>> new_p.price = 1000\r\n>>> new_p.save(update_fields=['price'])\r\nfrozenset({'price'})\r\n[Product]: \u5546\u54c1\u60c5\u5831\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f\r\n<\/code><\/pre>\n
                    \u5728\u4f7f\u7528update_fields\u53c2\u6570\u65f6\uff0cfrozenset({‘price’})\u63a5\u6536\u5230\u7684\u503c\u3002<\/p>\n
                    \u5982\u679c\u4f7f\u7528”new_p.save(update_fields=[‘price’])”\u800c\u4e0d\u662f”new_p.save()”\uff0c\u90a3\u4e48\u4f1a\u53d8\u4e3aNone\u3002<\/p>\n
                    \u5176\u4ed6\u7684\u4fe1\u53f7<\/h1>\n
                    \u56e0\u4e3a\u8fd9\u6b21\u6ca1\u6709\u4f7f\u7528\u7684signal\u5f88\u591a\uff0c\u6240\u4ee5\u6211\u4f1a\u5c06\u5b98\u65b9\u7f51\u7ad9\u7684\u94fe\u63a5\u653e\u5728\u8fd9\u91cc\u3002<\/p>\n
                     <\/p>\n
                      \n
                    • \n
                        pre_save: \u4fdd\u5b58\u3059\u308b\u524d\u306b\u3084\u3089\u305b\u305f\u3044\u51e6\u7406\u304c\u3042\u308b\u5834\u5408\u306b<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          \n
                        • \n
                            post_delete: \u524a\u9664\u3055\u308c\u305f\u3068\u304d\u306b\u3084\u3089\u305b\u305f\u3044\u51e6\u7406\u66f8\u304f(Django4.1\u304b\u3089\u306e\u6a5f\u80fd)<\/ul>\n<\/li>\n<\/ul>\n
                             <\/p>\n
                              \n
                            • \n
                                m2m_change: \u30e2\u30c7\u30eb\u3067ManyToManyField\u304c\u5909\u66f4\u3055\u308c\u305f\u3068\u304d\u306b\u884c\u3046<\/ul>\n<\/li>\n<\/ul>\n
                                 <\/p>\n
                                  pre_migrate\u3001post_migrate: \u672c\u756a\u74b0\u5883\u3067migration\u4e0d\u5b89\u306a\u3068\u304d\u306b\u6b63\u5e38\u306b\u7d42\u4e86\u3057\u305f\u3089log\u3068\u304b\u901a\u77e5\u51e6\u7406\u3055\u305b\u305f\u3044\u3068\u304b(Django 4.0\u304b\u3089\u306e\u6a5f\u80fd)<\/ul>\n
                                  \u7531\u4e8e\u6709\u5f88\u591a\u9009\u62e9\uff0c\u6240\u4ee5\u8bf7\u8bd5\u8bd5\u770b\u6709\u53ef\u80fd\u4f7f\u7528\u7684\u4e1c\u897f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                                  django.dispatch.receiver()\u7684\u7528\u6cd5\u662f\u4ec0\u4e48\uff1f \u6709\u65f6\u5019\u6211\u4eec\u60f3\u8981\u5728\u7279\u5b9a\u7684\u8868\u683c\u6570\u636e\u53d1\u751f\u66f4\u6539\u65f6\u8bb0 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-49885","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u5728[Django]\u4e2d\u4f7f\u7528[django.dispatch.receiver]\u6765\u5904\u7406\u5728\u6570\u636e\u521b\u5efa\u548c\u4fdd\u5b58\u65f6\u89e6\u53d1\u7684\u4fe1\u53f7 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728django\u4e2d\u4f7f\u7528django-dispatch-receiver\u6765\u5904\u7406\u5728\u6570\u636e\u521b\u5efa\u548c\u4fdd\u5b58\u65f6\u89e6\u53d1\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728[Django]\u4e2d\u4f7f\u7528[django.dispatch.receiver]\u6765\u5904\u7406\u5728\u6570\u636e\u521b\u5efa\u548c\u4fdd\u5b58\u65f6\u89e6\u53d1\u7684\u4fe1\u53f7\" \/>\n<meta property=\"og:description\" content=\"django.dispatch.receiver()\u7684\u7528\u6cd5\u662f\u4ec0\u4e48\uff1f \u6709\u65f6\u5019\u6211\u4eec\u60f3\u8981\u5728\u7279\u5b9a\u7684\u8868\u683c\u6570\u636e\u53d1\u751f\u66f4\u6539\u65f6\u8bb0 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728django\u4e2d\u4f7f\u7528django-dispatch-receiver\u6765\u5904\u7406\u5728\u6570\u636e\u521b\u5efa\u548c\u4fdd\u5b58\u65f6\u89e6\u53d1\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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