[英]"Cannot read property 'tablePath' of undefined" ( TYPE ORM )
{
"name": "TypeError"
"message": "Cannot read property 'tablePath' of undefined",
"stack": "TypeError: Cannot read property 'tablePath' of undefined\n at C:\\working\\Hianfa\\Hianfa\\api\\src\\query-builder\\SelectQueryBuilder.ts:1500:76\n at Array.map (<anonymous>)\n at SelectQueryBuilder.createJoinExpression (C:\\working\\Hianfa\\Hianfa\\api\\src\\query-builder\\SelectQueryBuilder.ts:1462:57)\n at SelectQueryBuilder.getQuery (C:\\working\\Hianfa\\Hianfa\\api\\src\\query-builder\\SelectQueryBuilder.ts:54:21)\n at SelectQueryBuilder.QueryBuilder.getQueryAndParameters (C:\\working\\Hianfa\\Hianfa\\api\\src\\query-builder\\QueryBuilder.ts:392:28)\n at SelectQueryBuilder.<anonymous> (C:\\working\\Hianfa\\Hianfa\\api\\src\\query-builder\\SelectQueryBuilder.ts:1948:40)\n at step (C:\\working\\Hianfa\\Hianfa\\api\\node_modules\\tslib\\tslib.js:136:27)\n at Object.next (C:\\working\\Hianfa\\Hianfa\\api\\node_modules\\tslib\\tslib.js:117:57)\n at C:\\working\\Hianfa\\Hianfa\\api\\node_modules\\tslib\\tslib.js:110:75\n at new Promise (<anonymous>)"
}
I am getting this error, while trying to map two tables with the mapping table.我在尝试使用映射表映射两个表时收到此错误。
VENDOR MODEL (TABLE 1)供应商模型(表 1)
@ManyToMany(type => VendorToCategory, vendorToCategory => vendorToCategory.vendor)
// @JoinColumn({name: 'vendor_vendor_category_id'})
public vendorToCategory: VendorToCategory[];
VENDOR CATEGORY MODEL (TABLE 2)供应商类别模型(表 2)
@ManyToMany(type => VendorToCategory, vendorToCategory => vendorToCategory.vendorCategory)
@JoinColumn({name: 'vendor_vendor_category_id'})
public vendorToCategory: VendorToCategory[];
MAPPING TABLE (VENDOR TO CATEGORY)映射表(供应商到类别)
@ManyToMany(type => Vendor, vendor => vendor.vendorToCategory)
@JoinColumn({ name: 'vendor_id' })
public vendor: Vendor[];
@ManyToMany(type => VendorCategory, vendorCategory => vendorCategory.vendorToCategory)
@JoinColumn({ name: 'vendor_category_id' })
public vendorCategory: VendorCategory[];
Please help me out with this error!请帮我解决这个错误!
Your problem is related to the wrong use of the @JoinColumn
decorator;您的问题与
@JoinColumn
装饰器的错误使用有关; you should use @JoinTable
while working with @ManyToMany
relationships.你应该使用
@JoinTable
与工作时@ManyToMany
关系。
So, instead of this:所以,而不是这个:
@ManyToMany(type => VendorToCategory, vendorToCategory =>
vendorToCategory.vendorCategory)
@JoinColumn({name: 'vendor_vendor_category_id'})
public vendorToCategory: VendorToCategory[];`
You should write:你应该写:
@ManyToMany(type => VendorToCategory, vendorToCategory => vendorToCategory.vendorCategory)
@JoinTable({
name: "vendor_vendor_category_id",
joinColumn: {
name: "vendorCategory",
referencedColumnName: "id"
},
inverseJoinColumn: {
name: "vendor",
referencedColumnName: "id"
}})
public vendor: Vendor[];`
The TypeORM docs aren't that specific when it comes to deal with relations, but they do provide some useful examples. TypeORM 文档在处理关系方面并不是那么具体,但它们确实提供了一些有用的示例。 So take a look at them if you want a detailed answer.
因此,如果您想要详细的答案,请查看它们。
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