我正在使用redux-orm,在添加实体后,我的选择器没有使用mapStateToProps中的新对象进行更新,因此导致render((不再被调用。我已经完成了教程,但看不到我做错了什么:
另一个组件是调用 BookReducer,所以我知道 100% 正在调用缩减器。
这是我的减速器:
export default function BookReducer(state = initialState, action) {
const session = orm.session(state);
switch (action.type) {
case 'newBook':
session.Book.create({ id: 0, type: 'novel' });
//I can see verify that the object has been added to the ORM
console.log(session.Book.all().toRefArray())
}
return session.state;
}
这是我的选择器:
import orm from './orm';
const BookSelector = createSelector(orm, state => state.orm, session => {
return session.Book.all().toRefArray()
});
这是我的组件:
class Main extends React.Component {
constructor(props) {
super(props);
}
render() {
console.log("debug")
console.log(this.props.books)
return (
<div>
{this.props.books}
</div>
)
function mapStateToProps(state) {
return {
isOpen: true,
books: BookSelector(state)
};
}
}
您似乎没有将主组件与mapStateToProps
联系起来。像export default connect(mapStateToProps)(Main);
一样使用connect
,并在Main
组件之外定义它
import connect from 'react-redux';
class Main extends React.Component {
constructor(props) {
super(props);
}
render() {
console.log("debug")
console.log(this.props.books)
return (
<div>
{this.props.books}
</div>
)
}
function mapStateToProps(state) {
return {
isOpen: true,
books: BookSelector(state)
};
}
export default connect(mapStateToProps)(Main);
您还需要导出和导入BookSelector
import orm from './orm';
const BookSelector = createSelector(orm, state => state.orm, session => {
return session.Book.all().toRefArray()
});
export default BookSelector;