Angular Condition Builder

> [!NOTE]
> This is fork of https://github.com/angular-ex/ngx-condition-builder to support Angular 16, which is originally fork of zebzhao's repo to maintence with the latest Angular

A modernized Angular 4+ query builder based on jQuery QueryBuilder. Support for heavy customization with Angular components and provides a flexible way to handle custom data types.

Installation

``
$ npm install @ultimo21/ngx-condition-builder --save
`

Basic Usage

##### app.module.ts
`javascript
import { QueryBuilderModule } from "angular2-query-builder";
import { AppComponent } from "./app.component"

@NgModule(imports: [
...,
QueryBuilderModule,
IonicModule.forRoot(AppComponent) // (Optional) for IonicFramework 2+
])
export class AppModule { }
`

##### app.component.html
`html
...

...
`
##### app.component.ts
`javascript
import { QueryBuilderConfig } from 'angular2-query-builder';

export class AppComponent {
query = {
condition: 'and',
rules: [
{field: 'age', operator: '<=', value: 'Bob'},
{field: 'gender', operator: '>=', value: 'm'}
]
};

config: QueryBuilderConfig = {
fields: {
age: {name: 'Age', type: 'number'},
gender: {
name: 'Gender',
type: 'category',
options: [
{name: 'Male', value: 'm'},
{name: 'Female', value: 'f'}
]
}
}
}
}
`

Custom Input Components

##### app.component.html
`html





`

##### app.component.ts
`javascript
query = {
condition: 'and',
rules: [
{field: 'birthday', operator: '=', value: new Date()}
]
};

config: QueryBuilderConfig = {
fields: {
birthday: {name: 'Birthday', type: 'date', operators: ['=', '<=', '>']
defaultValue: (() => return new Date())
},
}
}
`

Custom Styling (with Bootstrap 4)

##### app.component.html
`html

`
##### app.component.ts
`javascript
classNames: QueryBuilderClassNames = {
removeIcon: 'fa fa-minus',
addIcon: 'fa fa-plus',
arrowIcon: 'fa fa-chevron-right px-2',
button: 'btn',
buttonGroup: 'btn-group',
rightAlign: 'order-12 ml-auto',
switchRow: 'd-flex px-2',
switchGroup: 'd-flex align-items-center',
switchRadio: 'custom-control-input',
switchLabel: 'custom-control-label',
switchControl: 'custom-control custom-radio custom-control-inline',
row: 'row p-2 m-1',
rule: 'border',
ruleSet: 'border',
invalidRuleSet: 'alert alert-danger',
emptyWarning: 'text-danger mx-auto',
operatorControl: 'form-control',
operatorControlSize: 'col-auto pr-0',
fieldControl: 'form-control',
fieldControlSize: 'col-auto pr-0',
entityControl: 'form-control',
entityControlSize: 'col-auto pr-0',
inputControl: 'form-control',
inputControlSize: 'col-auto'
}
`

Customizing with Angular Material

Example of how you can completely customize the query component with another library like Angular Material. For the full example, please look at the source code provided in the demo.

#### app.component.html

`html


+ Rule
+ Ruleset
- Ruleset



remove




And
Or





{{field.name}}






{{value}}












{{ opt.name }}




...

`

Property Bindings Quick Reference

#### query-builder
|Name|Type|Required|Default|Description|
|:--- |:--- |:--- |:--- |:--- |
|allowRuleset|boolean|Optional|true| Displays the + Ruleset button if true. |
|allowCollapse|boolean|Optional|false| Enables collapsible rule sets if true. |
|classNames|object|Optional|| CSS class names for different child elements in query-builder component. |
|config|QueryBuilderConfig|Required|| Configuration object for the main component. |
|data|Ruleset|Optional|| (Use ngModel or value instead.) |
|emptyMessage|string|Optional|| Message to display for an empty Ruleset if empty rulesets are not allowed. |
|ngModel| Ruleset |Optional|| Object that stores the state of the component. Supports 2-way binding. |
|operatorMap|{ [key: string]: string[] }|Optional|| Used to map field types to list of operators. |
|persistValueOnFieldChange|boolean|Optional|false| If true, when a field changes to another of the same type, and the type is one of: string, number, time, date, or boolean, persist the previous value. This option is ignored if config.calculateFieldChangeValue is provided. |
|config.calculateFieldChangeValue|(currentField: Field, nextField: Field, currentValue: any) => any|Optional|| Used to calculate the new value when a rule's field changes. |
|value| Ruleset |Optional|| Object that stores the state of the component. |

Structural Directives

Use these directives to replace different parts of query builder with custom components. See example.

#### queryInput

Used to replace the input component. Specify the type/queryInputType to match specific field types to input template.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|Rule|Current rule object which contains the field, value, and operator|
|field|Field|Current field object which contains the field's value and name|
|options|Option[]|List of options for the field, returned by getOptions|
|onChange|() => void|Callback to handle changes to the input component|

#### queryOperator

Used to replace the query operator selection component.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|Rule|Current rule object which contains the field, value, and operator|
|operators|string[]|List of operators for the field, returned by getOperators|
|onChange|() => void|Callback to handle changes to the operator component|
|type|string|Input binding specifying the field type mapped to this input template, specified using syntax in above example|

#### queryField

Used this directive to replace the query field selection component.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|Rule|Current rule object which contains the field, value, and operator|
|getFields|(entityName: string) => void|Get the list of fields corresponding to an entity|
|fields|Field[]|List of fields for the component, specified by config|
|onChange|(fieldValue: string, rule: Rule) => void|Callback to handle changes to the field component|

#### queryEntity

Used to replace entity selection component.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|Rule|Current rule object which contains the field, value, and operator|
|entities|Entity[]|List of entities for the component, specified by config|
|onChange|(entityValue: string, rule: Rule) => void|Callback to handle changes to the entity component|

#### querySwitchGroup

Useful for replacing the switch controls, for example the AND/OR conditions. More custom conditions can be specified by using this directive to override the default component.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|RuleSet|Current rule set object which contain a list of child rules|
|onChange|() => void|Callback to handle changes to the switch group component|

#### queryArrowIcon

Directive to replace the expand arrow used in collapse/accordion mode of the query builder.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|RuleSet|Current rule set object which contain a list of child rules|

#### queryEmptyWarning

Can be used to customize the default empty warning message, alternatively can specify the emptyMessage property binding.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|RuleSet|Current rule set object which contain a list of child rules|
|message|string|Value passed to emptyMessage|

#### queryButtonGroup

For replacing the default button group for Add, Add Ruleset, Remove Ruleset buttons.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|RuleSet|Current rule set object which contain a list of child rules|
|addRule|() => void|Function to handle adding a new rule|
|addRuleSet|() => void|Function to handle adding a new rule set|
|removeRuleSet|() => void|Function to handle removing the current rule set|

#### queryRemoveButton

Directive to replace the default remove single rule button component.

|Context Name|Type|Description|
|:--- |:--- |:--- |
|$implicit|Rule|Current rule object which contains the field, value, and operator|
|removeRule|(rule: Rule) => void`|Function to handle removing a rule|

Dependencies

- Angular 8+