[英]Grocery Crud - CodeIgniter relation_n_n error
I have a problem while trying to save data (or update) in a crud with n_n relation, i have a product table, who is related to a product_detail, product detail has 3 foreign keys, to connect to a table called color, and other called material. 我在尝试通过n_n关系保存数据(或更新)时遇到问题,我有一个产品表,该表与product_detail相关,产品详细信息具有3个外键,以连接到名为color的表,以及其他称为材料。 Any idea why fail?, i appreciate your help, thanks.
知道为什么会失败吗?,我感谢您的帮助,谢谢。
The error is this: 错误是这样的:
A Database Error Occurred 发生数据库错误
Error Number: 1452 错误号:1452
Cannot add or update a child row: a foreign key constraint fails ( medina_db
. product_detail
, CONSTRAINT product_detail_ibfk_3
FOREIGN KEY ( material_id
) REFERENCES material
( id
)) 不能添加或更新子行,外键约束失败(
medina_db
。 product_detail
,约束product_detail_ibfk_3
外键( material_id
)参考material
( id
))
INSERT INTO product_detail
( product_id
, color_id
) VALUES ('4', '1') 插入到
product_detail
( product_id
, color_id
)值('4','1')
Filename: /Applications/MAMP/htdocs/industrias_medina/models/grocery_crud_model.php 文件名:/Applications/MAMP/htdocs/industrias_medina/models/grocery_crud_model.php
Line Number: 413 行号:413
My Grocery Crud code: 我的食品杂货代码:
$crud = new grocery_CRUD();
$crud->set_table('product')->set_subject('Productos');
$crud->set_relation_n_n("Colores", 'product_detail', 'color', 'product_id', 'color_id', 'name');
$crud->set_relation_n_n("Materiales", 'product_detail', 'material', 'product_id', 'material_id', 'name');
$crud->set_field_upload('image','assets/uploads/files');
$crud->fields('name','model','description', "Colores", "Materiales", 'image');
$output = $crud->render();
$this->_productos_output($output);
SQL: SQL:
CREATE TABLE `color` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=ucs2 AUTO_INCREMENT=2 ;
CREATE TABLE `material` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=2 ;
CREATE TABLE `product` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'Unique identifier',
`name` varchar(250) NOT NULL COMMENT 'Product''s name',
`model` varchar(250) NOT NULL COMMENT 'Product''s model',
`description` varchar(400) NOT NULL COMMENT 'Product''s description',
`image` varchar(400) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='Table to store products' AUTO_INCREMENT=13 ;
CREATE TABLE `product_detail` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`product_id` int(11) NOT NULL,
`color_id` int(11) NOT NULL,
`material_id` int(11) NOT NULL,
PRIMARY KEY (`id`,`product_id`,`color_id`,`material_id`),
KEY `product_id` (`product_id`),
KEY `color_id` (`color_id`),
KEY `material_id` (`material_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=14 ;
It looks like your product_detail table has a material_id column that references the material table. 您的product_detail表似乎具有一个引用该材料表的material_id列。 Your insert statement is not inserting anything into that material_id column.
您的insert语句未在该material_id列中插入任何内容。 You need to either insert a value into that column (that exists in material), set a default value that references the key in material, or set a default of NULL for that column.
您需要在该列(材料中存在)中插入一个值,设置引用材料中键的默认值,或者为该列设置默认值NULL。
Thanks, 谢谢,
Andrew 安德鲁
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