Struct EntitiesRelation 

pub struct EntitiesRelation<'a, D> { /* private fields */ }

Represents the relationship between entities in the database, used for validation.

Type Parameters

• D - The data type of the primary key

表示数据库中的实体之间的关系，用于验证。

类型参数

• D - 主键的数据类型

Implementations

impl<'a, D> EntitiesRelation<'a, D>

where D: PartialEq + Debug,

Implementation of the EntitiesRelation struct. EntitiesRelation结构体关系的实现。

pub fn validate(&self, values: Vec<&'a D>) -> Result<(), Error>

Validates the relation between entities.

It checks whether the number of values matches the relation type and whether the values match the primary key.

Arguments

• values - A vector of references to values to validate

Returns

• Ok if validation passes
• Err with a detailed error if validation fails

验证实体之间的关系。

检查值的数量是否与关系类型匹配，以及值是否与主键匹配。

参数

• values - 需要验证的值的引用向量

返回值

• 如果验证通过则返回Ok
• 如果验证失败则返回包含详细错误信息的Err

pub fn one_to_one(primary_key: &'a D) -> Self

Creates a new EntitiesRelation instance for one-to-one relations.

This relation type allows a single entity to be associated with another single entity.

Arguments

• primary_key - The primary key of the entity

Returns

A new EntitiesRelation instance with OneToOne relationship type

创建一对一关系的EntitiesRelation实例。

此关系类型允许单个实体与另一个单个实体关联。

参数

• primary_key - 实体的主键

返回值

具有一对一关系类型的新EntitiesRelation实例

pub fn one_to_many(primary_key: &'a D) -> Self

Creates a new EntitiesRelation instance for one-to-many relations.

This relation type allows one entity to be associated with multiple other entities.

Arguments

• primary_key - The primary key of the entity

Returns

A new EntitiesRelation instance with OneToMany relationship type

创建一对多关系的EntitiesRelation实例。

此关系类型允许一个实体与多个其他实体关联。

参数

• primary_key - 实体的主键

返回值

具有一对多关系类型的新EntitiesRelation实例

pub fn many_to_many(primary_key: &'a D) -> Self

Creates a new EntitiesRelation instance for many-to-many relations.

This relation type allows multiple entities to be associated with multiple other entities.

Arguments

• primary_key - The primary key of the entity

Returns

A new EntitiesRelation instance with ManyToMany relationship type

创建多对多关系的EntitiesRelation实例。

此关系类型允许多个实体与多个其他实体关联。

参数

• primary_key - 实体的主键

返回值

具有多对多关系类型的新EntitiesRelation实例