Python 提交行时出现Django外键约束错误
我刚刚创建了一个Django项目,并在mysql中直接添加了2: 1) 金融控股公司(tbl_控股公司) 2) 服务提供商(tbl_控股公司_服务提供商) 它们在My Sql中的两个数据定义都是: tbl_控股公司 tbl_控股公司服务提供商 我在Django models.py中创建了相关模型Python 提交行时出现Django外键约束错误,python,mysql,django,django-models,Python,Mysql,Django,Django Models,我刚刚创建了一个Django项目,并在mysql中直接添加了2: 1) 金融控股公司(tbl_控股公司) 2) 服务提供商(tbl_控股公司_服务提供商) 它们在My Sql中的两个数据定义都是: tbl_控股公司 tbl_控股公司服务提供商 我在Django models.py中创建了相关模型 class TblHoldings(models.Model): item_code = models.CharField(unique=True, max_length=5) prod
class TblHoldings(models.Model):
item_code = models.CharField(unique=True, max_length=5)
product_name = models.CharField(max_length=45)
service_provider = models.ForeignKey('TblHoldingsServiceProviders', models.DO_NOTHING, related_name='service_provider',db_column='service_provider')
account_details = models.CharField(max_length=100)
purchase_cost = models.IntegerField()
current_value = models.IntegerField()
purchase_date = models.DateTimeField(blank=True, null=True)
updated_at = models.DateTimeField(blank=True, null=True)
created_at = models.DateTimeField(blank=True, null=True)
class Meta:
verbose_name = 'Holding'
verbose_name_plural = 'Holdings'
managed = False
db_table = 'tbl_holdings'
class TblHoldingsServiceProviders(models.Model):
provider_name = models.CharField(max_length=100)
updated_at = models.DateTimeField(blank=True, null=True)
created_at = models.DateTimeField(blank=True, null=True)
class Meta:
verbose_name = "Lookup For Service Provider"
verbose_name_plural = 'Lookup For Service Providers'
managed = False
db_table = 'tbl_holdings_service_providers'
admin.py中的代码是
@admin.register(TblHoldings)
class HoldingsAdmin(admin.ModelAdmin):
list_display = ('item_code', 'product_name', 'service_provider', 'current_value', 'created_at')
ordering = ('purchase_date',)
search_fields = ('product_name',)
@admin.register(TblHoldingsServiceProviders)
class HoldingsServiceProviderAdmin(admin.ModelAdmin):
list_display = ('id', 'provider_name', 'created_at')
ordering = ('created_at',)
search_fields = ('provider_name',)
在尝试添加保留时,我得到以下错误:与外键约束有关
完整性错误位于/admin/app_fin/tblholdings/add/(1452),“无法添加”
或更新子行:外键约束失败
(\u财务
tbl\u控股
,约束fk\u服务提供商
外键(服务提供商
)引用
tbl\u holdings\u service\u providers
(provider\u name
)关于删除无操作
更新时)请求方法:POST请求
URL:admin/app_fin/tblholdings/add/Django
版本:2.2.7异常类型:IntegrityError异常值:(1452,
'无法添加或更新子行:外键约束失败
(\u财务
tbl\u控股
,约束fk\u服务提供商
外键(服务提供商
)引用
tbl\u holdings\u service\u providers
(provider\u name
)关于删除无操作
更新时)异常
位置:/root//venv/lib/python3.6/site-packages/MySQLdb/connections.py
在查询中,第231行是Python
可执行文件:/root//venv/bin/python版本:3.6.8
Python路径:['/root//project\',
“/root//venv/lib/python36.zip”,
“/root//venv/libremoved/python3.6”,
“/root//venv/lib/python3.6/lib dynload”,
“/usr/lib/python3.6”,
'/root/_-fin/venv/lib/python3.6/site-packages']Server
时间:2019年11月12日星期二09:51:28+0000
有人能指出我做错了什么吗。看起来您使用的外键不是主键。你可以试试这个
CREATE TABLE `tbl_holdings` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`item_code` varchar(5) NOT NULL,
`product_name` varchar(45) NOT NULL,
`service_provider` varchar(100) NOT NULL,
`account_details` varchar(100) NOT NULL,
`purchase_cost` int(15) NOT NULL,
`current_value` int(15) NOT NULL,
`purchase_date` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
UNIQUE KEY `item_code_UNIQUE` (`item_code`),
KEY `fk_service_provider_name_idx` (`service_provider`),
CONSTRAINT `fk_service_provider` FOREIGN KEY (`service_provider`) REFERENCES `tbl_holdings_service_providers` (`provider_id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
@admin.register(TblHoldings)
class HoldingsAdmin(admin.ModelAdmin):
list_display = ('item_code', 'product_name', 'service_provider', 'current_value', 'created_at')
ordering = ('purchase_date',)
search_fields = ('product_name',)
@admin.register(TblHoldingsServiceProviders)
class HoldingsServiceProviderAdmin(admin.ModelAdmin):
list_display = ('id', 'provider_name', 'created_at')
ordering = ('created_at',)
search_fields = ('provider_name',)
CREATE TABLE `tbl_holdings` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`item_code` varchar(5) NOT NULL,
`product_name` varchar(45) NOT NULL,
`service_provider` varchar(100) NOT NULL,
`account_details` varchar(100) NOT NULL,
`purchase_cost` int(15) NOT NULL,
`current_value` int(15) NOT NULL,
`purchase_date` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
UNIQUE KEY `item_code_UNIQUE` (`item_code`),
KEY `fk_service_provider_name_idx` (`service_provider`),
CONSTRAINT `fk_service_provider` FOREIGN KEY (`service_provider`) REFERENCES `tbl_holdings_service_providers` (`provider_id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1