Question

我正在尝试从一个可观察的响应中获取响应，对其进行过滤，并在下一个函数调用中使用该值。

这些是我的3个功能：

initTicket(options : ticket = {}, include_client : boolean ) {
    let employee = this.global.getEmployee()
    let submitter_id = null
    let options = {}

    return this.getUsers().subscribe(
      success => {
        let user = _.find(success['users'], { 'email': employee.email })
        submitter_id = user.id
        options.submitter_id = submitter_id

        this.createTicket(options)
      },
      err => {
        this.global.handleResponse(err.error, true)
      }
    )
  }

  getUsers() {
    let headers = this.setOptions()
    let org_id =  ORG_ID;
    let url = `${this.baseUrl}/organizations/${org_id}/users.json`

    return this.http.get(url, {headers: headers})
  }

  createTicket( options : ticket = {} ) {
    let headers = this.setOptions()

    let data = {
      "ticket": {
        "subject": options.subject,
        "comment": {
          "body": options.comment
        },
        "priority": options.priority,
        "group_id": options.group_id,
        "type": options.type,
        "tags": ['app'],
        "external_id": options.external_id,
        "submitter_id": 367510232431
      }
    }

    return this.http.post(`${ this.baseUrl }/tickets.json`, JSON.stringify(data), { headers: headers })
  }

这是链接两个可观察对象的正确方法还是应该使用subscribe()以外的函数？

Answer 1

我将使用switchMap和tap：

return this.getUsers()
.pipe(
  tap((res) => {

    let user = _.find(res['users'], { 'email': employee.email })
        submitter_id = user.id
        options.submitter_id = submitter_id
  }),
  switchMap(() => this.createTicket(options))
)
.subscribe(...

基本上tap成功运行，并且switchMap将订阅您的其他http通话。

或者如果您没有使用最新的RXJS版本：

return this.getUsers()
.do((res) => {

  let user = _.find(res['users'], { 'email': employee.email })
      submitter_id = user.id
      options.submitter_id = submitter_id
})
.switchMap(() => this.createTicket(options))
.subscribe(...

过滤后将可观察的响应传递给下一个可观察的响应

1 个答案: