|
| 1 | +# 验证承诺 |
| 2 | + |
| 3 | +- order: 4 |
| 4 | + |
| 5 | +验证表单值,并在承诺中返回错误。也支持回调。如果回调返回承诺,承诺的结果将在 “验证” 函数的承诺中返回。 |
| 6 | + |
| 7 | +:::lang=en-us |
| 8 | +# validate Promise |
| 9 | + |
| 10 | +- order: 4 |
| 11 | + |
| 12 | +validate form values with errors returned wrapped in a promise. Also supports callbacks. If the callback returns a promise, the results of the promise will be returned in a promise from the `validate` function. |
| 13 | + |
| 14 | +::: |
| 15 | +--- |
| 16 | + |
| 17 | +````jsx |
| 18 | +import ReactDOM from 'react-dom'; |
| 19 | +import React from 'react'; |
| 20 | +import { Input, Button, Checkbox } from '@alifd/next'; |
| 21 | +import Field from '@alifd/field'; |
| 22 | + |
| 23 | + |
| 24 | + |
| 25 | +const CheckboxGroup = Checkbox.Group; |
| 26 | + |
| 27 | +const list = [ |
| 28 | + { |
| 29 | + value: 'apple', |
| 30 | + label: 'apple' |
| 31 | + }, { |
| 32 | + value: 'pear', |
| 33 | + label: 'pear' |
| 34 | + }, { |
| 35 | + value: 'orange', |
| 36 | + label: 'orange' |
| 37 | + } |
| 38 | +]; |
| 39 | + |
| 40 | +class App extends React.Component { |
| 41 | + state = { |
| 42 | + checkboxStatus: true |
| 43 | + } |
| 44 | + field = new Field(this, {scrollToFirstError: -10}); |
| 45 | + |
| 46 | + isChecked(rule, value) { |
| 47 | + if (!value) { |
| 48 | + return Promise.reject('consent agreement not checked ') |
| 49 | + } else { |
| 50 | + return Promise.resolve(null); |
| 51 | + } |
| 52 | + } |
| 53 | + |
| 54 | + userName(rule, value) { |
| 55 | + if (value === 'frank') { |
| 56 | + return new Promise((resolve, reject) => { |
| 57 | + setTimeout(() => resolve('name existed'), 200); |
| 58 | + }) |
| 59 | + } else { |
| 60 | + return new Promise((resolve) => { |
| 61 | + setTimeout(() => resolve(null), 200); |
| 62 | + }) |
| 63 | + } |
| 64 | + } |
| 65 | + |
| 66 | + render() { |
| 67 | + const init = this.field.init; |
| 68 | + |
| 69 | + return (<div className="demo"> |
| 70 | + <Input {...init('input', {initValue: 'delete all', rules: {required: true}})} /> |
| 71 | + {this.field.getError('input') ? |
| 72 | + <span style={{color: 'red'}}>{this.field.getError('input').join(',')}</span> : ''} |
| 73 | + |
| 74 | + <br/> |
| 75 | + <br/> |
| 76 | + |
| 77 | + <Input placeholder="try onBlur" {...init('input1', { |
| 78 | + rules: [{ |
| 79 | + required: true, |
| 80 | + message: 'can not be empty', |
| 81 | + trigger: ['onBlur', 'onChange'] |
| 82 | + }] |
| 83 | + })} /> |
| 84 | + {this.field.getError('input1') ? |
| 85 | + <span style={{color: 'red'}}>{this.field.getError('input1').join(',')}</span> : ''} |
| 86 | + |
| 87 | + <br/> |
| 88 | + <br/> |
| 89 | + |
| 90 | + <Input defaultValue="" placeholder="try frank" {...init('username', { |
| 91 | + rules: [{ |
| 92 | + validator: this.userName, |
| 93 | + trigger: ['onBlur', 'onChange'] |
| 94 | + }] |
| 95 | + })} /> |
| 96 | + {this.field.getState('username') === 'loading' ? 'validating...' : ''} |
| 97 | + {this.field.getError('username') ? |
| 98 | + <span style={{color: 'red'}}>{this.field.getError('username').join(',')}</span> : ''} |
| 99 | + |
| 100 | + <br/> |
| 101 | + <br/> |
| 102 | + |
| 103 | + agreement: |
| 104 | + <Checkbox {...init('checkbox', { |
| 105 | + valueName: 'checked', |
| 106 | + rules: [{validator: this.isChecked}] |
| 107 | + })} /> |
| 108 | + {this.field.getError('checkbox') ? |
| 109 | + <span style={{color: 'red'}}>{this.field.getError('checkbox').join(',')}</span> : ''} |
| 110 | + |
| 111 | + <br/> |
| 112 | + <br/> |
| 113 | + |
| 114 | + <Input.TextArea placeholder=">3 and <10" {...init('textarea', { |
| 115 | + rules: [{ |
| 116 | + required: true, |
| 117 | + minLength: 3, |
| 118 | + maxLength: 10 |
| 119 | + }] |
| 120 | + })} /> |
| 121 | + {this.field.getError('textarea') ? |
| 122 | + <span style={{color: 'red'}}>{this.field.getError('textarea').join(',')}</span> : ''} |
| 123 | + |
| 124 | + <br/> |
| 125 | + <br/> |
| 126 | + |
| 127 | + {this.state.checkboxStatus ? <div> |
| 128 | + Array validate: |
| 129 | + <CheckboxGroup dataSource={list} {...init('checkboxgroup', { |
| 130 | + rules: [{ |
| 131 | + required: true, |
| 132 | + type: 'array', |
| 133 | + message: 'choose one please' |
| 134 | + }] |
| 135 | + })} style={{marginBottom: 10}}/> |
| 136 | + {this.field.getError('checkboxgroup') ? |
| 137 | + <span style={{color: 'red'}}>{this.field.getError('checkboxgroup').join(',')}</span> : ''} |
| 138 | + </div> : null} |
| 139 | + |
| 140 | + <br/> |
| 141 | + <br/> |
| 142 | + |
| 143 | + <Button type="primary" onClick={() => { |
| 144 | + this.field.validatePromise().then(({errors, values}) => { |
| 145 | + console.log(errors, values); |
| 146 | + }); |
| 147 | + }}>validate</Button> |
| 148 | + <Button onClick={() => { |
| 149 | + this.field.reset(); |
| 150 | + }}>reset</Button> |
| 151 | + |
| 152 | + <Button onClick={() => { |
| 153 | + if (this.state.checkboxStatus) { |
| 154 | + this.setState({checkboxStatus: false}); |
| 155 | + this.field.remove('checkboxgroup'); |
| 156 | + } else { |
| 157 | + this.setState({checkboxStatus: true}); |
| 158 | + } |
| 159 | + |
| 160 | + }}>{this.state.checkboxStatus ? 'delete' : 'restore'}</Button> |
| 161 | + </div>); |
| 162 | + } |
| 163 | +} |
| 164 | + |
| 165 | +ReactDOM.render(<App/>, mountNode); |
| 166 | +```` |
| 167 | + |
| 168 | +````css |
| 169 | +.demo .next-btn { |
| 170 | + margin-right: 5px; |
| 171 | +} |
| 172 | +```` |
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