在ngrx中,addOne是一个用于向实体集合开头添加一个新项目的操作。下面是如何在ngrx中使用addOne来实现这个功能的步骤:
export interface Project {
id: number;
name: string;
// 其他属性
}
import { EntityState, createEntityAdapter } from '@ngrx/entity';
export interface ProjectState extends EntityState<Project> {}
export const projectAdapter = createEntityAdapter<Project>();
export const initialProjectState: ProjectState = projectAdapter.getInitialState();
import { createReducer, on } from '@ngrx/store';
import { projectAdapter, initialProjectState } from './project.state';
import { addOne } from './project.actions';
export const projectReducer = createReducer(
initialProjectState,
on(addOne, (state, { project }) => projectAdapter.addOne(project, state))
);
import { createAction, props } from '@ngrx/store';
import { Project } from './project.model';
export const addOne = createAction('[Project] Add One', props<{ project: Project }>());
import { Component } from '@angular/core';
import { Store } from '@ngrx/store';
import { addOne } from './project.actions';
import { Project } from './project.model';
@Component({
// 组件配置
})
export class YourComponent {
constructor(private store: Store) {}
addProject() {
const project: Project = { id: 1, name: 'New Project' };
this.store.dispatch(addOne({ project }));
}
}
这样,当你调用addProject方法时,ngrx将会在实体集合开头添加一个新的项目。
关于ngrx和实体状态管理的更多信息,你可以参考以下链接:
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