使用angularngrx store effects通过id查询数据

Question

我正在使用 ngrx 6 和 angular 6，我的代码如下所示：

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()
          )
    })
  }
)
);

项目-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
   }
 }
`;

给定的graphql API在graphql playground上看到如下
```
query{
  findAllProjectMembers(projectId: projectID) {
    id
    memberId
    memberType
  }
}
```
如果你把上面的projectID换成数字eg:2就可以查询成功
url其中要在1号上使用的Project ID通过下面的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。

//更新项目-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()
          )
    })
  }
)
);

// 可能在组件中或者你调度 action 的地方传递 projectId

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

使用angularngrx store effects通过id查询数据

Using angular ngrx store effects to query data by id

angular

ngrx

apollo-client

ngrx-effects