我想实现一个记录到sqlite。手动注入构造函数得到错误签名
ilogger.ts
export interface ILogger {
write (log: Log): any;
}
ilogger.service.ts
export interface ILoggerService {
info(log: Log): any;
error(log: Log): any;
}
irepository.ts
export interface IRepository<T> {
find(key: number): any;
insert(data: T): any;
remove(key: number): any;
fetch(count: number, skip: number): any;
}
sqlite.logger.impl.ts
export class SqliteLoggerImpl implements ILogger {
sqliteRepo: IRepository<Log>;
SqliteLoggerImpl(sqliteRepo: IRepository<Log>) {
this.sqliteRepo = sqliteRepo;
}
write(log: Log): any {
return this.sqliteRepo.insert(log);
}
}
个
logger.service.impl.ts
export class LoggerServiceImpl implements ILoggerService {
logger: ILogger;
LoggerServiceImpl(logger: ILogger) {
this.logger = logger;
}
info(log: Log): any {
log.severity = 0;
return this.logger.write(log);
}
error(log: Log): any {
log.severity = 1;
return this.logger.write(log);
}
}
app.component.ts
@Component({
selector: "my-app",
templateUrl: "app.component.html"
})
export class AppComponent {
logs: Array<Log>;
loggerService: ILoggerService;
constructor() {
let repo: IRepository<Log> = new SqliteRepositoryImpl();
// [ts] Supplied parameters do not match any signature of call target
let logger: ILogger = new SqliteLoggerImpl(repo);
this.loggerService = new LoggerServiceImpl(logger);
}
}
我不会在这两条线的理解:
let logger: ILogger = new SqliteLoggerImpl(repo);
this.loggerService = new LoggerServiceImpl(logger);
SqliteLoggerImpl构造函数需要一个IRepository ,我已经给了它。 LoggerServiceImpl构造函数需要一个ILogger,我已经给它了。
为什么我仍然看到这个,“[ts]提供的参数不匹配呼叫目标的任何签名”?
new SqliteRepositoryImpl();这个班在哪里? –
你必须声明'constructor(sqliteRepo:IRepository)'而不是'SqliteLoggerImpl(sqliteRepo:IRepository ){'无处不在。 –
yurzui
@yurzui,你发现了,非常感谢。 这是正确的答案。 – MALINKA