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Getting started with Angular QueryBuilder component

03 Aug 2021 / 3 minutes to read

This section explains how to create and demonstrate the basic usage of the Query Builder module.

Dependencies

The list of dependencies required to use the Query Builder module in your application is given below:

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|-- @syncfusion/ej2-angular-querybuilder
    |-- @syncfusion/ej2-angular-base
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-querybuilder
    |-- @syncfusion/ej2-datamanager
    |-- @syncfusion/ej2-dropdowns
    |-- @syncfusion/ej2-calenders
    |-- @syncfusion/ej2-inputs

Setup Angular environment

You can use Angular CLI to setup your Angular applications. To install Angular CLI use the following command.

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npm install -g @angular/cli

Create an Angular application

Start a new Angular application using below Angular CLI command.

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ng new my-app
cd my-app

Installing Syncfusion Query Builder package

To install Query Builder package, use the following command.

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npm install @syncfusion/ej2-angular-querybuilder --save

The above package installs Query Builder dependencies which are required to render the component in the Angular environment.

Adding Query Builder module

Import Query Builder module into Angular application(app.module.ts) from the package @syncfusion/ej2-angular-querybuilder.

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import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

// Importing QueryBuilderModule from ej2-angular-querybuilder package.
import { QueryBuilderModule } from '@syncfusion/ej2-angular-querybuilder';
import { AppComponent }  from './app.component';

@NgModule({
  imports:      [ BrowserModule, QueryBuilderModule ], // Declaration of QueryBuilder module into NgModule.
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

Adding Syncfusion Query Builder component

Modify the template in app.component.ts file to render the Query Builder component.

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import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `<!-- To render Query Builder. -->
               <ejs-querybuilder width="70%">
                <e-columns>
                  <e-column field="EmployeeID" label="Employee ID" type="number"></e-column>
                  <e-column field="FirstName" label="First Name" type="string"></e-column>
                  <e-column field="TitleOfCourtesy" label="Title Of Courtesy" type="boolean" [values]="values"></e-column>
                  <e-column field="Title" label="Title" type="string"></e-column>
                  <e-column field="HireDate" label="Hire Date" type="date" format="dd/MM/yyyy"></e-column>
                  <e-column field="Country" label="Country" type="string"></e-column>
                  <e-column field="City" label="City" type="string"></e-column>
                </e-columns>
              </ejs-querybuilder>`
})
export class AppComponent  { }

Adding CSS reference

Add Query Builder component’s styles as given below in style.css.

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@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";
@import "../node_modules/@syncfusion/ej2-splitbuttons/styles/material.css";
@import "../node_modules/@syncfusion/ej2-dropdowns/styles/material.css";
@import "../node_modules/@syncfusion/ej2-inputs/styles/material.css";
@import "../node_modules/@syncfusion/ej2-calendars/styles/material.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/material.css";
@import "../node_modules/@syncfusion/ej2-querybuilder/styles/material.css";

Running the application

Run the application in the browser using the following command:

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ng serve

The following example shows a basic Query Builder component.

Source
Preview
app.component.ts
app.module.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    template: `<!-- To render Query Builder. -->
               <ejs-querybuilder width="70%">
                <e-columns>
                  <e-column field="EmployeeID" label="Employee ID" type="number"></e-column>
                  <e-column field="FirstName" label="First Name" type="string"></e-column>
                  <e-column field="TitleOfCourtesy" label="Title Of Courtesy" type="boolean" [values]="values"></e-column>
                  <e-column field="Title" label="Title" type="string"></e-column>
                  <e-column field="HireDate" label="Hire Date" type="date" format="dd/MM/yyyy"></e-column>
                  <e-column field="Country" label="Country" type="string"></e-column>
                  <e-column field="City" label="City" type="string"></e-column>
                </e-columns>
              </ejs-querybuilder>`
})

export class AppComponent {
   public values: string[] = ['Mr.', 'Mrs.'];

}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { QueryBuilderModule } from '@syncfusion/ej2-angular-querybuilder';
import { AppComponent } from './app.component';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        QueryBuilderModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

Rendering with rule

To render the Query Builder component with rule, use the rule property.

Source
Preview
app.component.ts
app.module.ts
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import { Component, OnInit } from '@angular/core';
import { RuleModel } from '@syncfusion/ej2-angular-querybuilder';

@Component({
    selector: 'app-root',
    template: `<!-- To render Query Builder. -->
               <ejs-querybuilder width="70%" [rule]="importRules">
                <e-columns>
                  <e-column field="EmployeeID" label="Employee ID" type="number"></e-column>
                  <e-column field="FirstName" label="First Name" type="string"></e-column>
                  <e-column field="TitleOfCourtesy" label="Title Of Courtesy" type="boolean" [values]="values"></e-column>
                  <e-column field="Title" label="Title" type="string"></e-column>
                  <e-column field="HireDate" label="Hire Date" type="date" format="dd/MM/yyyy"></e-column>
                  <e-column field="Country" label="Country" type="string"></e-column>
                  <e-column field="City" label="City" type="string"></e-column>
                </e-columns>
              </ejs-querybuilder>`
})

export class AppComponent implements OnInit {

    public importRules: RuleModel;
    public values: string[] = ['Mr.', 'Mrs.'];

    ngOnInit(): void {
        this.importRules = {
        'condition': 'and',
        'rules': [{
                'label': 'Employee ID',
                'field': 'EmployeeID',
                'type': 'number',
                'operator': 'equal',
                'value': 1
            },
            {
                'label': 'Title',
                'field': 'Title',
                'type': 'string',
                'operator': 'equal',
                'value': 'Sales Manager'
            }]
        };
    }
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { QueryBuilderModule } from '@syncfusion/ej2-angular-querybuilder';
import { AppComponent } from './app.component';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        QueryBuilderModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
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