英文:
How do I properly inject loggers into the database layer of my code?
问题
我的主要问题是如何将日志记录器注入到与模型相关联的函数中？
例如，如果我们有一个User模型：
type User struct {id string `json:"id" bson:"id"`name string `json:"name" bson:"name"`}
然后，假设我们有一个附加到它的函数：
func (user *User) Save() {...}
现在，我想做的是创建一个结构体，其中包含日志记录器和其他相关信息：
type UserStruct struct {logger ...dbConn ......}
现在我的问题是，如果我将其注入到控制器中，那么它们将可以访问它们不需要的对象。
我找不到一种好的方法来将其与控制器隔离开，并只将模型上的函数注入到控制器中。
英文:
My main problem is how to inject loggers into the functions attached to the models?
So for example, if we have a User model
type User struct {id string `json:"id" bson:"id"`name string `json:"name" bson:"name"`}
and then let's we have a function attached to it
func (user *User) Save() {...}
Now what I want to do with this is to create an struct that has logger and other information attached with it
type UserStruct struct {logger ...dbConn ......}
Now my problem is that if I inject this into the controllers then they would have access to the objects that they don't need.
I can't find a nice way to isolate these from the controller and only inject the functions on the models into the controller.
答案1
得分: 3
我建议在Go中使用一个持久层来接收所有这些数据对象，而不是实现一个活动记录模式。例如：
type Persistence struct {logger logging.Loggerconn *mongo.Client// ...}func NewPersistence(...) (*Persistence, error) {// 连接到Mongo等等return &Persistence{...}, nil}func (p *Persistence) SaveUser(user *User) error {// ...}func (p *Persistence) FindUserByName(username string) (*User, error) {// ...}
这样做可以将数据对象的持久化逻辑与其他业务逻辑分离，提高代码的可维护性和可测试性。
英文:
Rather than implementing an active record pattern in Go, I'd suggest using a persistence layer that receives all those data objects like User. For example:
type Persistence struct {logger logging.Loggerconn *mongo.Client// ...}func NewPersistence(...) (*Persistence, error) {// connect to mongo etcreturn &Persistence{...}, nil}func (p *Persistence) SaveUser(user *User) error {// ...}func (p *Persistence) FindUserByName(username string) (*User, error) {// ...}
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