[英]What's the reason for the error being thrown on init() method?
我使用https://www.npmjs.com/package/react-native-dynamodb为我的项目实现DynamoDB访问。 我使用与该网站完全相同的代码。
唯一的事情是,我看不到.init()
方法如何给我:将鼠标悬停在它上面时, Unresolved function or method init()
(我正在使用WebStorm IDE)。 我认为这就是我的应用无法运行的原因。 下面是代码以及我在模拟器中遇到的错误。
这是我的.js
文件:
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { ScrollView, Text, View, Button } from 'react-native';
import { logout } from '../redux/actions/auth';
import DropdownMenu from 'react-native-dropdown-menu';
import Icon from './Icon';
import DynamoDB from 'react-native-dynamodb';
let dynamodb = DynamoDB.init({
credentials: {
AccessKeyId: 'Some key',
SecretKey: 'Some key'
}
// region: 'us-east-1' - default, optional
// version: '20120810' - default, optional
})
dynamodb.table('user_choice').PutItem(
{
name: 'Jack Sparrow',
age: 30,
captain: true
},
{
ConditionExpression: "last_movie <> :movie",
ExpressionAttributeValues: {
":movie": {"S": "Pirates of the Caribbean: On Stranger Tides"}
}
})
.then((response) => console.log(response)) // AWS object response
.catch((error) => {
console.log(error)
})
class Secured extends Component {
render() {
var data = [["Literacy Leaders"], ["Wrestling Camp"], ["Screenplay Writing"], ["Panetarium Workshop"]];
return(
<ScrollView style={{padding: 20}}>
<Icon/>
<Text style={{fontSize: 27}}>
{`Welcome ${this.props.username}`}
</Text>
<View style={{flex: 1}}>
<DropdownMenu style={{flex: 1}}
bgColor={"purple"} //the background color of the head, default is grey
tintColor={"white"} //the text color of the head, default is white
selectItemColor={"orange"} //the text color of the selected item, default is red
data={data}
maxHeight={410} // the max height of the menu
handler={(selection, row) => alert(data[selection][row])} >
<View style={{flex: 1, alignItems: 'center', justifyContent: 'center'}} >
</View>
</DropdownMenu>
</View>
<View style={{margin: 20}}/>
<Button onPress={(e) => this.userLogout(e)} title="Logout"/>
</ScrollView>
);
}
}
const mapStateToProps = (state, ownProps) => {
return {
username: state.auth.username
};
}
const mapDispatchToProps = (dispatch) => {
return {
onLogout: () => { dispatch(logout()); }
}
}
export default connect(mapStateToProps, mapDispatchToProps)(Secured);
我检查了react-native-dynamodb
的源代码,似乎DynamoDB
并非默认导出,而是命名导出。
尝试像这样导入它:
import { DynamoDB } from 'react-native-dynamodb';
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