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init Form component
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<template>
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<div :class="classes">
<label :class="[prefixCls + '-label']" :style="labelStyles" v-if="label">{{ label }}</label>
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<div :class="[prefixCls + '-content']" :style="contentStyles">
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<slot></slot>
<div transition="fade" :class="[prefixCls + '-error']" v-if="validateState === 'error'">{{ validateMessage }}</div>
</div>
</div>
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</template>
<script>
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// https://github.com/ElemeFE/element/blob/dev/packages/form/src/form-item.vue
import AsyncValidator from 'async-validator';
const prefixCls = 'ivu-form-item';
function getPropByPath(obj, path) {
let tempObj = obj;
path = path.replace(/\[(\w+)\]/g, '.$1');
path = path.replace(/^\./, '');
let keyArr = path.split('.');
let i = 0;
for (let len = keyArr.length; i < len - 1; ++i) {
let key = keyArr[i];
if (key in tempObj) {
tempObj = tempObj[key];
} else {
throw new Error('[iView warn]: please transfer a valid prop path to form item!');
}
}
return {
o: tempObj,
k: keyArr[i],
v: tempObj[keyArr[i]]
};
}
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export default {
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props: {
label: {
type: String,
default: ''
},
labelWidth: {
type: Number
},
prop: {
type: String
},
required: {
type: Boolean,
default: false
},
rules: {
type: [Object, Array]
},
error: {
type: Boolean
},
validateStatus: {
type: Boolean
}
},
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data () {
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return {
prefixCls: prefixCls,
isRequired: false,
validateState: '',
validateMessage: '',
validateDisabled: false,
validator: {}
};
},
watch: {
error (val) {
this.validateMessage = val;
this.validateState = 'error';
},
validateStatus (val) {
this.validateState = val;
}
},
computed: {
classes () {
return [
`${prefixCls}`,
{
[`${prefixCls}-required`]: this.required || this.isRequired,
[`${prefixCls}-error`]: this.validateState === 'error',
[`${prefixCls}-validating`]: this.validateState === 'validating'
}
];
},
form() {
let parent = this.$parent;
while (parent.$options.name !== 'iForm') {
parent = parent.$parent;
}
return parent;
},
fieldValue: {
cache: false,
get() {
const model = this.form.model;
if (!model || !this.prop) { return; }
let path = this.prop;
if (path.indexOf(':') !== -1) {
path = path.replace(/:/, '.');
}
return getPropByPath(model, path).v;
}
},
labelStyles () {
let style = {};
const labelWidth = this.labelWidth || this.form.labelWidth;
if (labelWidth) {
style.width = `${labelWidth}px`;
}
return style;
},
contentStyles () {
let style = {};
const labelWidth = this.labelWidth || this.form.labelWidth;
if (labelWidth) {
style.marginLeft = `${labelWidth}px`;
}
return style;
}
},
methods: {
getRules () {
let formRules = this.form.rules;
const selfRules = this.rules;
formRules = formRules ? formRules[this.prop] : [];
return [].concat(selfRules || formRules || []);
},
getFilteredRule (trigger) {
const rules = this.getRules();
return rules.filter(rule => !rule.trigger || rule.trigger.indexOf(trigger) !== -1);
},
validate(trigger, callback = function () {}) {
const rules = this.getFilteredRule(trigger);
if (!rules || rules.length === 0) {
callback();
return true;
}
this.validateState = 'validating';
let descriptor = {};
descriptor[this.prop] = rules;
const validator = new AsyncValidator(descriptor);
let model = {};
model[this.prop] = this.fieldValue;
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validator.validate(model, { firstFields: true }, errors => {
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this.validateState = !errors ? 'success' : 'error';
this.validateMessage = errors ? errors[0].message : '';
callback(this.validateMessage);
});
},
resetField () {
this.validateState = '';
this.validateMessage = '';
let model = this.form.model;
let value = this.fieldValue;
let path = this.prop;
if (path.indexOf(':') !== -1) {
path = path.replace(/:/, '.');
}
let prop = getPropByPath(model, path);
if (Array.isArray(value) && value.length > 0) {
this.validateDisabled = true;
prop.o[prop.k] = [];
} else if (value) {
this.validateDisabled = true;
prop.o[prop.k] = this.initialValue;
}
},
onFieldBlur() {
this.validate('blur');
},
onFieldChange() {
if (this.validateDisabled) {
this.validateDisabled = false;
return;
}
this.validate('change');
}
},
ready () {
if (this.prop) {
this.$dispatch('on-form-item-add', this);
Object.defineProperty(this, 'initialValue', {
value: this.fieldValue
});
let rules = this.getRules();
if (rules.length) {
rules.every(rule => {
if (rule.required) {
this.isRequired = true;
return false;
}
});
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this.$on('on-form-blur', this.onFieldBlur);
this.$on('on-form-change', this.onFieldChange);
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}
}
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},
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beforeDestroy () {
this.$dispatch('on-form-item-remove', this);
}
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};
</script>
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