我正在使用React和Redux,并且我在表单中使用Redux-form。
我正在尝试从数据库中加载一些初始数据。在docs中,建议使用
{
load: loadAccount
}
在connect组件中,但是我正在努力正确地设置它。
我可以用不同的方式加载初始数据:添加调度动作以连接组件并从componentDidMount
调用它,但是我想了解如何设置{ load: loadAccount }
。
这是我的操作文件-我仅显示重要的操作-:
const actions = {
requestProject: () => {
return {
type: C.LOAD_PROJECT_STARTED,
};
},
receiveProject: (id, data) => {
return {
type: C.LOAD_PROJECT_SUCCESS,
id,
data,
};
},
loadProject: (id = '') => {
const url = '/api/projects/';
const encodedURI = isBrowser
? encodeURI(window.location.origin + url + id)
: encodeURI('http://localhost:' + config.SERVER + url + id);
return isBrowser
? function(dispatch) {
dispatch(actions.requestProject());
return fetch(encodedURI)
.then(
(response) => {
return response.json();
},
(error) => {
return console.log('An error occurred.', error);
}
)
.then((data) => {
return dispatch(actions.receiveProject(id, data));
});
}
: fetch(encodedURI)
.then((response) => {
return response.json();
})
.then((data) => {
return data;
})
.catch((error) => {
return Promise.reject(Error(error.message));
});
},
};
export default actions;
然后是我的异径管,同样只有一个:
export const Project = (state = {}, action) => {
switch (action.type) {
case C.LOAD_PROJECT_STARTED:
console.log('LOAD_PROJECT_STARTED');
return Object.assign({}, state, {
isFetching: true,
});
case C.LOAD_PROJECT_SUCCESS:
return Object.assign({}, state, {
...action.data.Project,
isFetching: false,
});
case C.SUBMIT_PROJECT_FORM_STARTED:
return Object.assign({}, state, {
isFetching: true,
});
case C.SUBMIT_PROJECT_FORM_SUCCESS:
return Object.assign({}, state, {
...action.data.Project,
isFetching: false,
});
default:
return state;
}
};
export const form = formReducer;
这是表单的连接ProjectForm
组件:
import { connect } from 'react-redux';
import ProjectFormUi from './ProjectFormUi';
import actions from '../../redux/actions';
import { load as loadAccount } from './account'
export const ProjectForm = connect(
(state) => {
return {
initialValues: state.Project,
};
},
(dispatch) => {
return {
loadProject(id) {
dispatch(actions.loadProject(id));
},
onSubmit(data) {
dispatch(actions.sendingProject(data));
},
};
},
{
load: loadAccount,
}
)(ProjectFormUi);
export default ProjectForm;
最后是实际的表单组件ProjectFormUi
。
import React from 'react';
import { Field, reduxForm } from 'redux-form';
class ProjectFormUi extends React.Component {
constructor(props) {
super(props);
this.state = {
};
}
componentDidMount() {
this.props.loadProject(1);
}
static getDerivedStateFromProps(newProps, prevState) {
return newProps != prevState ? newProps : null;
}
componentDidUpdate(prevProps) {
if (this.props.Project !== prevProps.Project) {
this.setState({
isFetching: this.props.Project.isFetching,
});
}
}
render() {
const { handleSubmit, load, pristine, reset, submitting } = this.props;
return (
<form onSubmit={handleSubmit}>
<div>
<label>First Name</label>
<div>
<Field name="title" component="input" type="text" placeholder="First Name" />
</div>
</div>
<div>
<button type="submit" disabled={submitting}>
Submit
</button>
<button type="button" disabled={pristine || submitting} onClick={reset}>
Undo Changes
</button>
</div>
</form>
);
}
}
export default reduxForm({
form: 'ProjectForm',
enableReinitialize: true,
})(ProjectFormUi);
正如我所说,目前我正在使用以下命令在连接ProjectForm
组件中加载数据:
loadProject(id) {
dispatch(actions.loadProject(id));
},
,它是从componentDidMount
组件中的ProjectFormUi
调用的。
但我想了解如何像docs那样设置设置,加载数据
{
load: loadAccount
}
在连接ProjectForm
组件中。