动态更改angular2-query-builder中的配置 [英] change the config in angular2-query-builder dynamically
本文介绍了动态更改angular2-query-builder中的配置的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在这里，我试图根据Angular2-query-builder中的字段值更改运算符.我的TS文件.
Here, i am trying to change the operators based on the field value in Angular2-query-builder. My TS file.
@Component({
selector: 'my-app',
template: `
<div>
<h2>Hello {{name}}</h2>
</div>
<query-builder [(ngModel)]='uiExpression' [config]='config' (ngModelChange)="apply()" #que (onChangeCallback)="onchange()">
<ng-container *queryButtonGroup="let ruleset; let addRule=addRule; let addRuleSet=addRuleSet; let removeRuleSet=removeRuleSet">
<button mat-button (click)="addRule()">+ Rule</button>
<button mat-button (click)="addRuleSet()">+ Ruleset</button>
<button mat-button (click)="removeRuleSet()">- Ruleset</button>
</ng-container>
<ng-container *queryRemoveButton="let rule; let removeRule=removeRule">
<button mat-icon-button color="accent" (click)="removeRule(rule)">
<mat-icon>remove</mat-icon>
</button>
</ng-container>
<ng-container *querySwitchGroup="let ruleset">
<mat-radio-group *ngIf="ruleset" [(ngModel)]="ruleset.condition">
<mat-radio-button value="and">And</mat-radio-button>
<mat-radio-button value="or">Or</mat-radio-button>
</mat-radio-group>
</ng-container>
<ng-container *queryInput="let rule; type: 'string'">
<mat-form-field>
<input matInput [(ngModel)]="rule.value">
</mat-form-field>
</ng-container>
<ng-container *queryInput="let rule; type: 'number'">
<mat-form-field>
<input matInput type="number" [(ngModel)]="rule.value">
</mat-form-field>
</ng-container>
<ng-container *queryInput="let rule; type: 'date'">
<mat-form-field>
<input matInput [matDatepicker]="picker" [(ngModel)]="rule.value">
<mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
<mat-datepicker #picker></mat-datepicker>
</mat-form-field>
</ng-container>
<ng-container *queryInput="let rule; let field=field; let options=options; type: 'multiselect'">
<mat-form-field>
<mat-select multiple [(ngModel)]="rule.value">
<mat-option *ngFor="let opt of options" [value]="opt.value">
{{ opt.name }}
</mat-option>
</mat-select>
</mat-form-field>
</ng-container>
<ng-container *queryField="let rule; let fields=fields; let changeField=changeField">
<mat-form-field>
<mat-select [(ngModel)]="rule.field" (ngModelChange)="changeFields($event, rule)">
<mat-option *ngFor="let field of fields" [value]="field.value">{{field.name}}</mat-option>
</mat-select>
</mat-form-field>
</ng-container>
<ng-container *queryOperator="let rule; let operators=operators">
<mat-form-field>
<mat-select [(ngModel)]="rule.operator" (ngModelChange)="changeOperator(rule)">
<mat-option *ngFor="let value of operators" [value]="value">{{value}}</mat-option>
</mat-select>
</mat-form-field>
</ng-container>
</query-builder>
<div>{{userExpression}}</div>
`,
})
export class App {
public operators = [
{
"attributeType": "STRING",
"operators": [
{ "displayOperator": "Equals", "sqlOperator": " =(VALUE)" },
{ "displayOperator": "Does not Equal", "sqlOperator": "<>(VALUE)" },
{ "displayOperator": "Starts With", "sqlOperator": "LIKE %(VALUE)" },
{ "displayOperator": "Ends With", "sqlOperator": "LIKE (VALUE)%" },
{ "displayOperator": "Contains", "sqlOperator": "LIKE %(VALUE)%" },
{ "displayOperator": "Does Not Contain", "sqlOperator": "NOT LIKE %(VALUE)" },
{ "displayOperator": "Does Not Start With", "sqlOperator": "NOT LIKE (VALUE)%" },
{ "displayOperator": "Does Not End With", "sqlOperator": "NOT LIKE %(VALUE)%" }
]
},
{
"attributeType": "Numeric",
"operators": [
{ "displayOperator": "Equals", "sqlOperator": " =(VALUE)" },
{ "displayOperator": "Does not Equal", "sqlOperator": "<>(VALUE)" },
{ "displayOperator": "Greater", "sqlOperator": ">(VALUE)" },
{ "displayOperator": "Equal or Greater", "sqlOperator": ">=(VALUE)" },
{ "displayOperator": "Less", "sqlOperator": "<(VALUE)" },
{ "displayOperator": "Equal or Less", "sqlOperator": "<=(VALUE)" },
{ "displayOperator": "Within", "sqlOperator": "BETWEEN (VALUE1) AND (VALUE2)" },
]
},
{
"attributeType": "Date",
"operators": [
{ "displayOperator": "Equals", "sqlOperator": " =(VALUE)" },
{ "displayOperator": "On or After", "sqlOperator": ">=(VALUE)" },
{ "displayOperator": "Before", "sqlOperator": "<(VALUE)" },
{ "displayOperator": "Between", "sqlOperator": "BETWEEN (VALUE1) AND (VALUE2)" }
]
}
]
AttributeDummy: any[] = [
{
"userColumnName": "Attribute 1",
"colType": "multiselect",
"isListType": "Y",
"userColumnOptions": [
{ name: "Male", value: "m" },
{ name: "Female", value: "f" }
]
},
{
"userColumnName": "Attribute 2",
"colType": "date",
"isListType": "N",
"userColumnOptions": ""
},
{
"userColumnName": "Attribute 3",
"colType": "string",
"isListType": "N",
"userColumnOptions": ""
},
{
"userColumnName": "Attribute 4",
"colType": "number",
"isListType": "N",
"userColumnOptions": ""
}
]
name: string;
uiExpression = {};
fieldsS = {}
@Input() config: QueryBuilderConfig = {
fields: {}
}
userExpression: String = 'Attribute = undefined';
constructor() {
this.name = `Plunker! v${VERSION.full}`;
for (var i = 0; i < this.AttributeDummy.length; i++) {
// operators: (this.AttributeDummy[i].colType.toLowerCase()==this.operator.operators[0].attributeType.toLowerCase()) ? this.operator.operators[0].operators :
// (this.AttributeDummy[i].colType.toLowerCase()==this.operator.operators[1].attributeType.toLowerCase()) ? this.operator.operators[1].operators :
// (this.AttributeDummy[i].colType.toLowerCase()==this.operator.operators[2].attributeType.toLowerCase()) ? this.operator.operators[2].operators : ''
this.fieldsS[this.AttributeDummy[i].userColumnName] = {
name: this.AttributeDummy[i].userColumnName,
type: this.AttributeDummy[i].colType.toLowerCase(),
operators: this.operators,
options: this.AttributeDummy[i].userColumnOptions
}
this.config.fields = this.fieldsS;
this.detect.markForCheck();
console.log('config ', JSON.stringify(this.config))
}
if (this.AttributeDummy.length > 0) {
console.log('attributes length > 0');
this.uiExpression = {
condition: 'and',
rules: [
{
field: this.AttributeDummy[0].userColumnName,
operator: this.operators[0]
}
]
}
}
}
}
在更改属性时，尝试将查询构建器中的运算符动态更新到UI中.我将运算符列表更新为config，但不会更新为UI.
while changing the attribute am trying to update operators in the query builder dynamically into the UI. I updating the operators list into config but it won't updating into the UI.
这里，有一个参考链接: https://zebzhao.github.io/Angular- QueryBuilder/demo/我想根据该字段更新运算符.
Here, one reference link: https://zebzhao.github.io/Angular-QueryBuilder/demo/ I want to update the operators based on the field.
推荐答案
对此我找不到任何好的文档.我可以通过阅读query-builder.component.js src来了解它的工作原理.
I couldn't find any good documentation for this. I was able to get it working though by reading through the query-builder.component.js src to see how it works.
我正在使用
- angular2-query-builder 0.4.2
- 角度8.0.0
添加对QueryBuilderComponent的引用.
Add a reference to your QueryBuilderComponent.
@ViewChild(QueryBuilderComponent, { static: true }) queryBuilder: QueryBuilderComponent;
然后，在更新配置后，调用queryBuilder上的changeField以使用新的配置值更新UI.
then after you update your config, call changeField on the queryBuilder to update the UI with the new config values.
//set the options for your field
this.config.fields['myField'].options = [
{name: 'a', value:'1'},
{name: 'b', value:'2'},
{name: 'c', value:'3'}
]
this.refreshField('myField);
private refreshField(field: string): void {
// get the current rule
const srcRule = this.queryBuilder.data.rules.find((x: Rule) => x.field === field) as Rule;
if (srcRule) {
// cache the current rule's selected value from our datasource
const value = srcRule ? srcRule.value : undefined;
// call change field to rebind new options to the UI
this.queryBuilder.changeField(field, srcRule);
// reset the previously selected value to the dropdown because changeField nulls out the value.
srcRule.value = value;
}
}
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