Question

我正在使用ngrx 6和angular 6，我的代码如下：

effects.ts

import * as fromProjectMemberActions from '../project-member/project-member.actions';
import * as fromProjectMemberGraphQL from '../../members/members.graphql';

@Effect({dispatch: false})
loadProjectMember$ = this.actions$.pipe(
ofType(fromProjectMemberActions.ProjectMemberActionTypes.GetProjectMembers),
tap(
  action => {
    this.apollo.watchQuery({
      query: fromProjectMemberGraphQL.GET_ALL_PROJECT_MEMBERS,
      variables: { 
        projectID : // Project ID is needed
      }
    }).valueChanges.subscribe((response: any) => {
        console.log(response)
        this.store.dispatch(
          new fromProjectMemberActions.UpsertProjectMembers({
            projectMembers: response.data.findAllProjectMember
          })
        )
        this.store.dispatch(
              new fromProjectMemberActions.DoneLoadingProjectMembers()
          )
    })
  }
)
);

project-member.actions.ts

export class GetProjectMembers implements Action {
  readonly type = ProjectMemberActionTypes.GetProjectMembers;
}
export class UpsertProjectMembers implements Action {
  readonly type = ProjectMemberActionTypes.UpsertProjectMembers;
    constructor(public payload: { projectMembers: ProjectMember[] }) {}
  }

members.graphql.ts

import gql from 'graphql-tag';

 export const GET_ALL_PROJECT_MEMBERS = gql`
 query getAllProjectMembers($projectID: Long!) {
    findAllProjectMembers(projectId: $projectID) {
      id
      memberId
      memberType
   }
 }
`;

在graphql操场上可以看到给定的graphql API
```
query{
  findAllProjectMembers(projectId: projectID) {
    id
    memberId
    memberType
  }
}
```
如果将上面的projectID替换为一个数字，例如：2，它将成功查询数据

要通过以下URL传递编号1上使用的项目ID的URL

http://localhost/project-manager/view-project/2/members

我需要帮助来提取上面的项目ID，并在效果文件中使用它来查询成员列表

Answer 1

我会说。

//更新project-member.actions.ts

export class GetProjectMembers implements Action {
  readonly type = ProjectMemberActionTypes.GetProjectMembers;
  constructor(public payload: { projectId: number }) {}
}

//并更新效果

@Effect({dispatch: false})
loadProjectMember$ = this.actions$.pipe(
ofType(fromProjectMemberActions.ProjectMemberActionTypes.GetProjectMembers),
map((action: any) => action.payload),
tap(
  payload => {
    this.apollo.watchQuery({
      query: fromProjectMemberGraphQL.GET_ALL_PROJECT_MEMBERS,
      variables: { 
        projectID : payload.projectId
      }
    }).valueChanges.subscribe((response: any) => {
        console.log(response)
        this.store.dispatch(
          new fromProjectMemberActions.UpsertProjectMembers({
            projectMembers: response.data.findAllProjectMember
          })
        )
        this.store.dispatch(
              new fromProjectMemberActions.DoneLoadingProjectMembers()
          )
    })
  }
)
);

//可能在组件中，或者在您调度操作的地方传递projectId

subscribe to router {
  this.store.dispatch(new GetProjectMembers({ projectId })
}

使用角度NGRX存储效果按ID查询数据

1 个答案: