{"id":1294,"date":"2017-08-22T01:41:33","date_gmt":"2017-08-21T17:41:33","guid":{"rendered":"http:\/\/www.yueguangzu.net\/?p=1294"},"modified":"2017-09-09T12:41:48","modified_gmt":"2017-09-09T04:41:48","slug":"%e8%a1%a8%e7%bb%93%e6%9e%84%e5%85%b3%e7%b3%bb","status":"publish","type":"post","link":"http:\/\/www.yueguangzu.net\/?p=1294","title":{"rendered":"[Django\u7cfb\u5217]6.\u8868\u7ed3\u6784\u5173\u7cfb"},"content":{"rendered":"

1.\u6570\u636e\u5e93\u518d\u6620\u5c04<\/span><\/h4>\n
\u5047\u8bbe\u5df2\u7ecf\u5b9a\u4e49\u4e86models \u5bf9\u8c61Author,\u5e76\u4e14\u4e5f\u5df2\u7ecf\u8fc1\u79fb\u5230\u4e86\u6570\u636e\u5e93.<\/span><\/h5>\n
# -*- coding: utf-8 -*-<\/span>\r\nfrom<\/span> __future__<\/span> import<\/span> unicode_literals<\/span>\r\nfrom<\/span> django<\/span>.db<\/span> import<\/span> models<\/span>\r\n\u200b\r\nclass<\/span> Author<\/span>(models<\/span>.Model<\/span>):\r\n \u00a0  name<\/span>=models<\/span>.CharField<\/span>(max_length<\/span>=30<\/span>)\r\n \u00a0  age<\/span>=models<\/span>.IntegerField<\/span>()\r\n\u200b\r\n \u00a0  def<\/span> __unicode__<\/span>(self<\/span>):\r\n \u00a0 \u00a0 \u00a0  return<\/span> self<\/span>.name<\/span><\/pre>\n
\u5982\u679c\u6b64\u65f6\u8981\u589e\u52a02\u4e2a\u5b57\u6bb5email,bill_id,\u53ea\u9700\u8981\u5728\u5bf9\u5e94\u7684\u7c7b\u4e0b\u9762\u589e\u52a02\u4e2a\u5bf9\u8c61.<\/h5>\n
# -*- coding: utf-8 -*-<\/span>\r\nfrom<\/span> __future__<\/span> import<\/span> unicode_literals<\/span>\r\nfrom<\/span> django<\/span>.db<\/span> import<\/span> models<\/span>\r\n\u200b\r\nclass<\/span> Author<\/span>(models<\/span>.Model<\/span>):\r\n \u00a0  name<\/span>=models<\/span>.CharField<\/span>(max_length<\/span>=30<\/span>)\r\n \u00a0  age<\/span>=models<\/span>.IntegerField<\/span>()\r\n \u00a0  email<\/span>=models<\/span>.EmailField<\/span>(null<\/span>=True<\/span>,blank<\/span>=True<\/span>,unique<\/span>=True<\/span>) #\u8fd9\u91cc\u76f4\u63a5\u4f7f\u7528EmailField\u7c7b\u578b<\/span>\r\n \u00a0  bill_id<\/span>=models<\/span>.CharField<\/span>(max_length<\/span>=20<\/span>,null<\/span>=True<\/span>,default<\/span>='13800138000'<\/span>) #\u66f4\u6539\u8868\u7ed3\u6784,\u901a\u5e38\u9700\u8981\u6ce8\u660e\u957f\u5ea6,\u662f\u5426\u53ef\u4e3a\u7a7a,\u5982\u679c\u662f\u53ef\u4e3a\u7a7a,\u9700\u8981\u6307\u5b9a\u9ed8\u8ba4\u503c.<\/span>\r\n\u200b\r\n \u00a0  class<\/span> Meta<\/span>:\r\n \u00a0 \u00a0 \u00a0  db_table<\/span>='books_new_book'<\/span>  #\u4f7f\u7528\u8be5\u5143\u7c7b,\u53ef\u4ee5\u628a\u8868\u540d\u6539\u4e3abooks_new_book<\/span>\r\n \u00a0  def<\/span> __unicode__<\/span>(self<\/span>):\r\n \u00a0 \u00a0 \u00a0  return<\/span> self<\/span>.name<\/span><\/pre>\n
#\u518d\u6620\u5c04<\/span>\r\npython<\/span> manage<\/span>.py<\/span> makemigrations<\/span>\r\npython<\/span> manage<\/span>.py<\/span> migrate<\/span>\r\n###\u4ee3\u7801\u6267\u884c\u6548\u679c<\/span>\r\n>><\/span>python<\/span> manage<\/span>.py<\/span> makemigrations<\/span>\r\nMigrations<\/span> for<\/span> 'book'<\/span>:\r\n  book<\/span>\\<\/span>migrations<\/span>\\000<\/span>2<\/span>_auto_20170821_2051<\/span>.py<\/span>\r\n \u00a0  -<\/span> Add<\/span> field<\/span> bill_id<\/span> to<\/span> author<\/span>\r\n \u00a0  -<\/span> Add<\/span> field<\/span> email<\/span> to<\/span> author<\/span>\r\n \u00a0  -<\/span> Rename<\/span> table<\/span> for<\/span> author<\/span> to<\/span> books_new_book<\/span>\r\n>><\/span>thon<\/span> manage<\/span>.py<\/span> migrate<\/span>\r\nOperations<\/span> to<\/span> perform<\/span>:\r\n  Apply<\/span> all<\/span> migrations<\/span>: admin<\/span>, auth<\/span>, book<\/span>, contenttypes<\/span>, sessions<\/span>\r\nRunning<\/span> migrations<\/span>:\r\n  Applying<\/span> book<\/span>.0002<\/span>_auto_20170821_2051<\/span>... OK<\/span>  #\u6620\u5c04\u6210\u529f<\/span><\/pre>\n
\u901a\u8fc7sqlite3 db.sqlite3\u68c0\u67e5\u60c5\u51b5<\/h5>\n
sqlite<\/span>><\/span> .tables<\/span>\r\nauth_group<\/span> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  book_book<\/span> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \r\nauth_group_permissions<\/span> \u00a0 \u00a0  books_new_book<\/span> \u00a0 #\u8be5\u8868\u540d\u662f\u901a\u8fc7db_table='books_new_book\u81ea\u5b9a\u4e49<\/span>\r\nauth_permission<\/span> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 django_admin_log<\/span> \u00a0 \u00a0 \u00a0 \u00a0  \r\nauth_user<\/span> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 django_content_type<\/span> \u00a0 \u00a0 \u00a0 \r\nauth_user_groups<\/span> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  django_migrations<\/span> \u00a0 \u00a0 \u00a0 \u00a0 \r\nauth_user_user_permissions<\/span>  django_session<\/span> \u00a0  \r\n\u200b\r\n#\u67e5\u770b\u8868\u7ed3\u6784,bill_id,email\u5b57\u6bb5\u5df2\u6210\u529f\u6dfb\u52a0\u5230\u6570\u636e\u5e93\u8868<\/span>\r\nsqlite<\/span>><\/span> .schema<\/span> books_new_book<\/span>\r\nCREATE<\/span> TABLE<\/span> \"books_new_book\"<\/span> (\"id\"<\/span> integer<\/span> NOT<\/span> NULL<\/span> PRIMARY<\/span> KEY<\/span> AUTOINCREMENT<\/span>, \"name\"<\/span> varchar<\/span>(30<\/span>) NOT<\/span> NULL<\/span>, \"age\"<\/span> integer<\/span> NOT<\/span> NULL<\/span>, \"bill_id\"<\/span> varchar<\/span>(20<\/span>) NULL<\/span>, \"email\"<\/span> varchar<\/span>(254<\/span>) NULL<\/span> UNIQUE<\/span>);\r\n\u200b\r\n#\u53ef\u4ee5\u770b\u5230bill_id\u5b57\u6bb5\u81ea\u52a8\u8bbe\u7f6e\u4e3a\u9ed8\u8ba4\u503c'13800138000'<\/span>\r\nsqlite<\/span>><\/span> select<\/span> *<\/span> from<\/span> books_new_book<\/span>; \r\n3<\/span>|<\/span>yangfan<\/span>|<\/span>25<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n4<\/span>|<\/span>Fusheng<\/span>|<\/span>29<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n12<\/span>|<\/span>FF<\/span>|<\/span>26<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n13<\/span>|<\/span>FF<\/span>|<\/span>26<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n28<\/span>|<\/span>\"zhangsan\"<\/span>|<\/span>40<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n29<\/span>|<\/span>zhangsan<\/span>|<\/span>40<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n30<\/span>|<\/span>zhangsan<\/span>|<\/span>40<\/span>|<\/span>13800138000<\/span>|<\/span>\r\n31<\/span>|<\/span>fusheng<\/span>|<\/span>29<\/span>|<\/span>13800138000<\/span>|<\/span><\/pre>\n
2.\u5b57\u6bb5\u7c7b\u578b\u4e0e\u65b9\u6cd5\uff08Field type & function\uff09<\/h4>\n
2.1IntegerField<\/code><\/span><\/h5>\n
\u8868\u793a\u7684\u8303\u56f4\u662f<\/span>-<\/span>2147483648<\/span>-<\/span>2147483647<\/span><\/pre>\n
2.2SmallIntegerField<\/code><\/span><\/h5>\n
\u8868\u793a\u7684\u8303\u56f4\u662f<\/span>-<\/span>32768<\/span>-<\/span>32767<\/span><\/pre>\n
2.3PositiveIntegerField<\/code><\/span><\/h5>\n
\u8868\u793a\u7684\u8303\u56f4\u662f<\/span>0<\/span>-<\/span>2147483647<\/span><\/pre>\n
2.4PositiveSmallIntegerField<\/code><\/span><\/h5>\n
\u8868\u793a\u7684\u8303\u56f4\u662f<\/span>0<\/span>-<\/span>32767<\/span><\/pre>\n
2.5BigIntegerField<\/code><\/span><\/h5>\n
\u8868\u793a\u7684\u8303\u56f4\u662f<\/span>-<\/span>9223372036854775808<\/span>-<\/span>9223372036854775807<\/span><\/pre>\n
2.6DecimalField<\/code><\/span><\/h5>\n
\u6709\u4e24\u4e2a\u5fc5\u9700\u7684\u53c2\u6570\uff1a<\/span>\r\nmax_digits<\/span>=ingt_number<\/span>:\u9650\u5b9a\u6570\u5b57\u7684\u6700\u5927\u4f4d\u6570\uff08\u5305\u542b\u5c0f\u6570\u4f4d\uff09<\/span>\r\ndecimal_places<\/span>=int_number<\/span>:\u5b58\u50a8\u6570\u5b57\u7684\u5c0f\u6570\u4f4d<\/span><\/pre>\n
2.7AutoField<\/code><\/span><\/h5>\n
\u6839\u636e\u5df2\u6709<\/span>id<\/span>\u81ea\u589e\u957f\u7684\u6574\u5f62\u552f\u4e00\u5b57\u6bb5\uff0c\u4e00\u822c\u6bcf\u4e2a<\/span>model<\/span>\u7c7b\u4e0d\u9700\u8bbe\u7f6e\u8be5\u5b57\u6bb5\uff0c\u56e0\u4e3a<\/span>django<\/span>\u4f1a\u4e3a\u6bcf\u4e2a<\/span>model<\/span>\u81ea\u52a8\u8bbe\u7f6e<\/span><\/pre>\n
2.8CharField<\/code><\/span><\/h5>\n
\u9700\u8981\u6307\u5b9a\u6700\u5927\u5bbd\u5ea6<\/span> max_length<\/span>=xxx<\/span><\/pre>\n
2.9TextField<\/code><\/span><\/h5>\n
\u65e0\u6700\u5927\u5bbd\u5ea6\uff0c\u5982\u679c\u6709\u6700\u5927\u5bbd\u5ea6\uff0c\u5c06\u5728<\/span>admin<\/span>\u9875\u9762\u4e2d\u7684\u6587\u672c\u8f93\u5165\u6846\u4e2d\u4f53\u73b0\u3002<\/span><\/pre>\n
2.10ImageField<\/code><\/span><\/h5>\n
\u7ee7\u627f\u4e86<\/span>FileField<\/span>\u7684\u6240\u6709\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u800c\u4e14\u8fd8\u80fd\u81ea\u52a8\u9a8c\u8bc1\u4e0a\u4f20\u7684\u5bf9\u8c61\u662f\u5426\u4e3a\u5408\u6cd5\u7684\u56fe\u50cf<\/span><\/pre>\n
2.11FloatField<\/code><\/span><\/h5>\n
\u76f8\u5f53\u4e8e<\/span>Python<\/span>\u4e2d\u7684<\/span>float<\/span><\/pre>\n
2.12DateTimeField<\/code><\/span><\/h5>\n
\u76f8\u5f53\u4e8e<\/span>Python<\/span>\u4e2d\u7684<\/span>datetime<\/span><\/pre>\n
2.13DateField<\/code><\/span><\/h5>\n
\u76f8\u5f53\u4e8e<\/span>Python<\/span>\u4e2d<\/span>datetime<\/span>.date<\/span><\/pre>\n
2.14BooleanField<\/code><\/span><\/h5>\n
\u5982\u679c\u6ca1\u6709\u6307\u5b9a<\/span>default<\/span>\uff0c\u9ed8\u8ba4\u4e3a<\/span>None<\/span>\u3002\u5982\u679c\u9700\u8981\u80fd\u53d8\u6210<\/span>null<\/span>,\u5219\u5e94\u8be5\u4f7f\u7528<\/span>NullBooleanField<\/span><\/pre>\n
2.15NullBooleanField<\/code><\/span><\/h5>\n
\u53ef\u4ee5\u7a7a\u7684<\/span>Boolean<\/span><\/pre>\n
2.16EmailField<\/code><\/span><\/h5>\n
\u9ed8\u8ba4<\/span>max_length<\/span>=254<\/span>,validators<\/span>\u53ef\u4ee5\u68c0\u6d4b\u683c\u5f0f<\/span>,\u5728<\/span>form<\/span>\u4e2d\u4f7f\u7528<\/span><\/pre>\n
2.17FileField<\/code><\/span><\/h5>\n
\u8fd9\u4e2a\u5b57\u6bb5\u4e0d\u80fd\u8bbe\u7f6e<\/span>primary_key<\/span>\u548c<\/span>unique<\/span>\u9009\u9879<\/span>.\u5728\u6570\u636e\u5e93\u4e2d\u5b58\u50a8\u7c7b\u578b\u662f<\/span>varchar<\/span>\uff0c\u9ed8\u8ba4\u6700\u5927\u957f\u5ea6\u4e3a<\/span>100.<\/span><\/pre>\n
2.18FilePathField<\/code><\/span><\/h5>\n
2.19URLField<\/code><\/span><\/h5>\n
\u9ed8\u8ba4<\/span>max_length<\/span>=200<\/span>\uff0c\u6709\u6821\u9a8c\u673a\u5236<\/span><\/pre>\n
2.20UUIDField<\/code><\/span><\/h5>\n
\u4e00\u4e2a<\/span>char<\/span>(32<\/span>)\u7684\u56fa\u5b9a\u7c7b\u578b\uff0c\u4f7f\u7528\u65f6\u9700\u8981\u5bfc\u5165<\/span>uuid<\/span>\u5e93\u3002<\/span>\r\nUUIDField<\/span>(default<\/span>=uuid<\/span>.uuid4<\/span>)<\/pre>\n
3.\u5b57\u6bb5\u65b9\u6cd5\u53c2\u6570<\/h4>\n
\u5728\u4f7f\u7528\u4ee5\u4e0a\u8fd9\u4e9bField\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e9b\u5e38\u7528\u7684\u53c2\u6570\uff1a<\/h5>\n
3.1null<\/code><\/span><\/h5>\n
\u9ed8\u8ba4\u4e3a<\/span>False<\/span>\uff0c\u5982\u679c\u6307\u5b9a\u4e3a<\/span>True<\/span>\u8868\u793a\u8be5\u5b57\u6bb5\u53ef\u4ee5\u4e3a\u7a7a\uff0c\u4e00\u822c\u5728<\/span>Char<\/span>\u548c<\/span>Text<\/span>\u4e2d\u4e0d\u5e94\u8be5\u4f7f\u7528<\/span>Null<\/span>\uff0c\u800c\u5e94\u8be5\u4f7f\u7528<\/span>blank<\/span>\uff0c<\/span>null<\/span>\u662f\u7eaf\u7cb9\u662f\u6570\u636e\u5e93\u7684\u8bed\u6cd5<\/span>\r\nread_count<\/span>=IntegerField<\/span>(null<\/span>=True<\/span>)<\/pre>\n
3.2blank<\/code><\/span><\/h5>\n
\u9ed8\u8ba4\u4e3a<\/span>False<\/span>\uff0c\u5982\u679c\u6307\u5b9a\u4e3a<\/span>True<\/span>\uff0c\u5219\u5728<\/span>form<\/span>\u8868\u5355\u9a8c\u8bc1\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u4e3a\u7a7a\u3002<\/span>blank<\/span>\u662f<\/span>django<\/span>\u7ed9\u8868\u5355\u9a8c\u8bc1\u7684\u65f6\u5019\u6dfb\u52a0<\/span>:\r\ncontent<\/span>=TextField<\/span>(blank<\/span>=True<\/span>)<\/pre>\n
3.3default<\/code><\/span><\/h5>\n
\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u503c<\/span>\r\ncontent<\/span>=TextField<\/span>(default<\/span>=\u2019<\/span>article<\/span>\u2019<\/span>)<\/pre>\n
3.4editable<\/code><\/span><\/h5>\n
\u662f\u5426\u53ef\u4ee5\u7f16\u8f91\uff0c\u9ed8\u8ba4\u4e3a<\/span>True<\/span>\uff0c\u82e5\u4e3a<\/span>False<\/span>\uff0c\u5219\u4e0d\u4f1a\u5728<\/span>admin<\/span>\/<\/span>\u754c\u9762\u663e\u793a<\/span>\r\nid<\/span>=UUIDField<\/span>(editable<\/span>=False<\/span>)<\/pre>\n
3.5primary_key<\/code><\/span><\/h5>\n
\u6307\u5b9a\u662f\u5426\u662f\u4e3b\u952e<\/span>\r\nd<\/span>=UUIDField<\/span>(primary_key<\/span>=True<\/span>)<\/pre>\n
3.6null<\/code><\/span><\/h5>\n
\u9ed8\u8ba4\u4e3a<\/span>False<\/span>\uff0c\u5982\u679c\u6307\u5b9a\u4e3a<\/span>True<\/span>\u8868\u793a\u8be5\u5b57\u6bb5\u53ef\u4ee5\u4e3a\u7a7a\uff0c\u4e00\u822c\u5728<\/span>Char<\/span>\u548c<\/span>Text<\/span>\u4e2d\u4e0d\u5e94\u8be5\u4f7f\u7528<\/span>Null<\/span>\uff0c\u800c\u5e94\u8be5\u4f7f\u7528<\/span>blank<\/span>\uff0c<\/span>null<\/span>\u662f\u7eaf\u7cb9\u662f\u6570\u636e\u5e93\u7684\u8bed\u6cd5<\/span>\r\nread_count<\/span>=IntegerField<\/span>(null<\/span>=True<\/span>)<\/pre>\n
3.7unique<\/code><\/span><\/h5>\n
\u6307\u5b9a\u662f\u5426\u552f\u4e00<\/span>\r\nstu_no<\/span> = CharField<\/span>(unique<\/span>=True<\/span>)<\/pre>\n
3.8choice<\/code><\/span><\/h5>\n
\u53ef\u9009\u7684\uff0c\u9650\u5236\u4e86\u8be5\u9009\u9879\u7684\u5b57\u6bb5\u503c\u5fc5\u987b\u662f\u6240\u6307\u5b9a\u7684<\/span>choice<\/span>\u4e2d\u7684\u4e00\u4e2a<\/span><\/pre>\n
3.9db_column<\/code><\/span><\/h5>\n
\u6570\u636e\u5e93<\/span>column<\/span>\u540d\u79f0\u3002\u9ed8\u8ba4\u4e3a\u672c\u5b57\u6bb5\u7684\u540d\u79f0<\/span><\/pre>\n
3.10db_index<\/code><\/span><\/h5>\n
\u5982\u679c\u4e3a<\/span>True<\/span>\u7684\u8bdd\uff0c\u8be5\u5b57\u6bb5\u7684\u6570\u636e\u5e93\u7d22\u5f15\u5c06\u4f1a\u88ab\u521b\u5efa<\/span><\/pre>\n
3.11DateField.auto_now<\/code><\/span><\/h5>\n
\u6bcf\u6b21\u4fee\u6539\u90fd\u4f1a\u5c06\u5f53\u524d\u65f6\u95f4\u66f4\u65b0\u8fdb\u53bb\uff0c\u53ea\u6709\u8c03\u7528<\/span>Model<\/span>.save<\/span>()\u65b9\u6cd5\u624d\u4f1a\u8c03\u7528\uff0c<\/span>QuerySet<\/span>.update<\/span>\u65b9\u6cd5\u5c06\u4e0d\u4f1a\u8c03\u7528\u3002\u8fd9\u4e2a\u53c2\u6570\u53ea\u662f<\/span>Date<\/span>\u548c<\/span>DateTime<\/span>\u4ee5\u53ca<\/span>Time<\/span>\u7c7b\u624d\u6709\u7684<\/span>\r\nupdate_time<\/span> = DateField<\/span>(auto_now<\/span>=True<\/span>)\r\nmodify_time<\/span><\/pre>\n
3.12DateField.auto_now_add<\/code><\/span><\/h5>\n
\u7b2c\u4e00\u6b21\u6dfb\u52a0\u8fdb\u53bb\uff0c\u90fd\u4f1a\u5c06\u5f53\u524d\u65f6\u95f4\u8bbe\u7f6e\u8fdb\u53bb\u3002\u4ee5\u540e\u4fee\u6539\uff0c\u4e0d\u4f1a\u4fee\u6539\u8fd9\u4e2a\u503c<\/span>\r\nCreate_time<\/span><\/pre>\n
4.choice\u7684\u7528\u6cd5<\/h4>\n
\u8fd9\u91cc\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5b66\u4e60\u8bb0\u5f55\u7684\u7c7bmodel,<\/h5>\n
record_choice\u662f\u4e00\u4e2a\u5143\u7956,\u91cc\u9762\u679a\u4e3e\u4e86\u8bfe\u5802\u8bb0\u5f55\u76844\u79cd\u72b6\u51b5(\u5df2\u7b7e\u5230,\u8fdf\u5230,\u7f3a\u52e4,\u65e9\u9000)<\/h4>\n
class<\/span> StudyRecord<\/span>(models<\/span>.Model<\/span>):\r\n \u00a0  course_record<\/span>=models<\/span>.ForeignKey<\/span>(CourseRecord<\/span>,verbose_name<\/span>=u'\u7b2c\u51e0\u5929\u7684\u8bfe\u7a0b'<\/span>)\r\n \u00a0  student<\/span>=models<\/span>.ForeignKey<\/span>(StudentInfo<\/span>,verbose_name<\/span>=u'\u5b66\u5458'<\/span>)\r\n \u00a0  record_choice<\/span>=(('checked'<\/span>,u'\u5df2\u7b7e\u5230'<\/span>),\r\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ('late'<\/span>,u'\u8fdf\u5230'<\/span>),\r\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ('noshow'<\/span>,u'\u7f3a\u52e4'<\/span>),\r\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ('leave_early'<\/span>,u'\u65e9\u9000'<\/span>),\r\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0  )\r\n \u00a0  record<\/span>=models<\/span>.CharField<\/span>(u'\u4e0a\u8bfe\u8bb0\u5f55'<\/span>,choices<\/span>=record_choice<\/span>,default<\/span>='checked'<\/span>,max_length<\/span>=15<\/span>)#\u901a\u8fc7choice\u5b57\u6bb5\u65b9\u6cd5,\u6765\u5f15\u7528\u4e0a\u9762\u5b9a\u4e49\u597d\u7684record_choice<\/span><\/pre>\n
5.\u5173\u7cfb\u578b\u7684\u5b57\u6bb5<\/h4>\n
\u9664\u4e86\u4e00\u4e9b\u5b57\u6bb5\u7684\u7c7b\u578b\u7684Field\u7c7b\uff0cdjango\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5173\u7cfb\u578b\u7684fields\uff0c\u6bd4\u5982\u5916\u952e\u3001\u4e00\u5bf9\u591a\uff0c\u591a\u5bf9\u591a\u7b49\uff0c\u4e0b\u9762\u5c06\u505a\u4e00\u4e2a\u7b80\u5355\u7684\u89e3\u91ca\uff1a<\/h5>\n
5.1\u4e00\u5bf9\u591aForeignKey<\/code><\/span><\/h5>\n
ForeignKey<\/span>\uff1a\u5916\u952e\u3002\u8bed\u6cd5\u662f<\/span>ForeignKey<\/span>(othermodel<\/span>,on_delete<\/span>)\r\n    othermodel<\/span>\u8868\u793a\u7684\u662f\u5176\u4ed6\u6a21\u578b\uff0c\u6ce8\u610f\uff0c\u5982\u679c\u8fd9\u4e2a<\/span>othermodel<\/span>\u6a21\u578b\u5728\u672c\u6a21\u578b\u4e4b\u540e\u5b9a\u4e49\u7684\uff0c\u5219\u5fc5\u987b\u4f7f\u7528\u5b57\u7b26\u4e32\u8868\u793a\u3002<\/span>\r\non_delete<\/span>\u8868\u793a\u5220\u9664\u7684\u65f6\u5019\u600e\u4e48\u5904\u7406\uff0c\u53ef\u4ee5\u53d6\u5982\u4e0b\u503c\uff1a<\/span>\r\n    CASCADE<\/span>:\u7ea7\u8054\u5220\u9664\uff0c\u5982\u679c\u5220\u9664\u4e00\uff0c\u76f8\u5173\u8054\u7684\u90a3\u4e2a\u591a\u4e5f\u4f1a\u5220\u9664<\/span>\r\n    PROTECT<\/span>\uff1a\u4fdd\u62a4\u7c7b\u578b\u3002\u5982\u679c\u5220\u9664\uff0c\u5c06\u4f1a\u629b\u51fa\u4e00\u4e2a<\/span>ProtectedError<\/span>\u9519\u8bef<\/span>\r\n    SET_NULL<\/span>\uff1a\u5982\u679c\u5220\u9664\u4e86\u672c\u6761\u6570\u636e\uff0c\u5916\u952e\u7684\u90a3\u6761\u6570\u636e\u5c06\u4f1a\u8bbe\u7f6e\u4e3a<\/span>null<\/span>\uff0c\u8fd9\u4e2a\u53ea\u6709\u5728\u5916\u952e<\/span>null<\/span>\u4e3a<\/span>True<\/span>\u7684\u60c5\u51b5\u4e0b\u624d\u53ef\u4ee5\u4f7f\u7528<\/span>\r\n    SET_DEFAULT<\/span>\uff1a\u5982\u679c\u5220\u9664\u4e86\u672c\u6761\u6570\u636e\uff0c\u5916\u952e\u90a3\u6761\u6570\u636e\u5c06\u4f1a\u7f6e\u4e3a\u9ed8\u8ba4\u503c\uff0c\u8fd9\u4e2a\u53ea\u6709\u5728\u5916\u952e\u90a3\u4e2a\u5b57\u6bb5\u8bbe\u7f6e\u4e86<\/span>default<\/span>\u53c2\u6570\u624d\u53ef\u4ee5\u4f7f\u7528\u3002<\/span><\/pre>\n
models.py\u4ee3\u7801\u793a\u4f8b<\/h5>\n
class<\/span> Publisher<\/span>(models<\/span>.Model<\/span>):\r\n \u00a0  name<\/span> = models<\/span>.CharField<\/span>(max_length<\/span>=30<\/span>)\r\n \u00a0  address<\/span> = models<\/span>.CharField<\/span>(max_length<\/span>=50<\/span>)\r\n\u200b\r\n \u00a0  def<\/span> __unicode__<\/span>(self<\/span>):\r\n \u00a0 \u00a0 \u00a0  return<\/span> self<\/span>.name<\/span>\r\n \u00a0  \r\nclass<\/span> Author<\/span>(models<\/span>.Model<\/span>):\r\n \u00a0  name<\/span> = models<\/span>.CharField<\/span>(max_length<\/span>=30<\/span>)\r\n \u00a0  age<\/span> = models<\/span>.IntegerField<\/span>()\r\n \u00a0  email<\/span> = models<\/span>.EmailField<\/span>()\r\n\u200b\r\n \u00a0  def<\/span> __unicode__<\/span>(self<\/span>):\r\n \u00a0 \u00a0 \u00a0  return<\/span> self<\/span>.name<\/span>\r\n\u200b\r\nclass<\/span> Book<\/span>(models<\/span>.Model<\/span>):\r\n \u00a0  title<\/span> = models<\/span>.CharField<\/span>(max_length<\/span>=100<\/span>)\r\n \u00a0  authors<\/span> = models<\/span>.ManyToManyField<\/span>(Author<\/span>) #\u91c7\u7528\u591a\u5bf9\u591a\u65b9\u5f0f<\/span>\r\n \u00a0  publisher<\/span> = models<\/span>.ForeignKey<\/span>(Publisher<\/span>) #\u91c7\u7528\u4e00\u5bf9\u4e00\u5916\u952e\u65b9\u5f0f<\/span>\r\n\u200b\r\n \u00a0  def<\/span> __unicode__<\/span>(self<\/span>):\r\n \u00a0 \u00a0 \u00a0  return<\/span> self<\/span>.title<\/span><\/pre>\n
\u6f14\u793a\u6548\u679c<\/h5>\n
\u8fdb\u5165<\/span>python<\/span> manage<\/span>.py<\/span> shell<\/span>:\r\n>>><\/span>p<\/span> = Publisher<\/span>(name<\/span>=\"\u6e05\u534e\u5927\u5b66\u51fa\u7248\u793e\"<\/span>,address<\/span>=\"\u5317\u4eac\"<\/span>)\r\n>>><\/span>p<\/span>.save<\/span>()\r\n>>><\/span> b<\/span>= Book<\/span>(title<\/span>=\"python web \u6307\u5357\"<\/span>)\r\n>>><\/span>b<\/span>.publisher<\/span> = p<\/span>\r\n>>><\/span>b<\/span>.save<\/span>()<\/pre>\n
##\u591a\u5bf9\u591a<\/span>\r\nManyToManyField<\/span>\uff1a\u8bed\u6cd5\u662f<\/span>ManyToManyField<\/span>(othermodel<\/span>)\r\n    othermodel<\/span>\u8868\u793a\u7684\u662f\u5176\u4ed6\u6a21\u578b\uff0c\u5982\u679c<\/span>othermodel<\/span>\u8fd9\u4e2a\u6a21\u578b\u5728\u672c\u6a21\u578b\u4e4b\u540e\u5b9a\u4e49\u7684\uff0c\u5219\u5fc5\u987b\u4f7f\u7528\u5b57\u7b26\u4e32\uff08\u2019<\/span>othermodel<\/span>\u2019\uff09<\/span>\r\n\u200b\r\n>>><\/span>a<\/span> = Author<\/span>(name<\/span>=\"\u5f20\u4e09\"<\/span>,age<\/span>=40<\/span>)\r\n>>><\/span>a<\/span>.save<\/span>()\r\n>>><\/span>b<\/span> = Book<\/span>(title<\/span>=\"python web \u6307\u5357\"<\/span>)\r\n>>><\/span>b<\/span>.author<\/span>.add<\/span>(a<\/span>)\r\n>>><\/span>b<\/span>.save<\/span>()<\/pre>\n
\u7531\u4e8e\u5b58\u5728\u4e00\u5bf9\u591a\u548c\u591a\u5bf9\u591a\u5173\u7cfb,\u6240\u4ee5\u5728\u65b0\u5efabook\u8bb0\u5f55\u65f6,\u52a1\u5fc5\u9700\u8981\u5148\u6dfb\u52a0\u51fa\u7248\u793e(Publisher),\u4f5c\u8005(Author),\u5e76\u4fdd\u5b58\u5165\u5e93,\u518d\u8fdb\u884cbook\u7684\u8bb0\u5f55\u589e\u52a0,\u5426\u5219\u4f1a\u62a5\u9519.<\/span><\/h5>\n","protected":false},"excerpt":{"rendered":"
1.\u6570\u636e\u5e93\u518d\u6620\u5c04 \u5047\u8bbe\u5df2\u7ecf\u5b9a\u4e49\u4e86models \u5bf9\u8c61Author,\u5e76\u4e14\u4e5f\u5df2\u7ecf\u8fc1\u79fb\u5230\u4e86\u6570\u636e\u5e93. # -*- coding: utf-8 -*- from __future__ import unicode_literals from djang […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[54],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=\/wp\/v2\/posts\/1294"}],"collection":[{"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1294"}],"version-history":[{"count":2,"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=\/wp\/v2\/posts\/1294\/revisions"}],"predecessor-version":[{"id":1426,"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=\/wp\/v2\/posts\/1294\/revisions\/1426"}],"wp:attachment":[{"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1294"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1294"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yueguangzu.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1294"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}