SAP Spartacus Title 下拉菜单列表数据的读取逻辑
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SAP Spartacus Title 下拉菜单列表数据的读取逻辑
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this.titleQuery 的賦值邏輯:
class UserProfileService {constructor(userAccountService, authService, userProfileConnector, eventService, userIdService, query, command) {this.userAccountService = userAccountService;this.authService = authService;this.userProfileConnector = userProfileConnector;this.eventService = eventService;this.userIdService = userIdService;this.query = query;this.command = command;this.updateCommand = this.command.create((payload) => this.userIdService.takeUserId(true).pipe(switchMap((uid) => this.userProfileConnector.update(uid, payload.details).pipe(tap(() => {this.eventService.dispatch({ user: payload.details }, UserAccountChangedEvent);})))), {strategy: CommandStrategy.Queue,});this.closeCommand = this.command.create(() => this.userIdService.takeUserId(true).pipe(switchMap((uid) => this.userProfileConnector.remove(uid).pipe(tap(() => this.authService.logout())))));this.titleQuery = this.query.create(() => this.userProfileConnector.getTitles(), {reloadOn: [LanguageSetEvent],});}get() {return this.userAccountService.get();}類型是 Query,數(shù)據(jù)類型是 Title[]:
萬變不離其宗,還是通過 connector 去取數(shù)據(jù):
創(chuàng)建 query 實(shí)例時(shí),要傳入一個(gè)箭頭函數(shù)作為 Loaderfactory:
在執(zhí)行 query create 方法時(shí),通過 switchMapTo,觸發(fā)這個(gè) loaderFactory 的執(zhí)行:
最后通過傳統(tǒng)的 HTTP client 去讀取數(shù)據(jù):
更多Jerry的原創(chuàng)文章,盡在:“汪子熙”:
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