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@@ -88,53 +88,41 @@ Now that you have the Ignite UI for Angular Query Builder module or directives i
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## Using the Angular Query Builder
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If no expression tree is initially set, you start by creating a group of conditions linked with [`AND`]({environment:angularApiUrl}/enums/filteringlogic.html#and) or [`OR`]({environment:angularApiUrl}/enums/filteringlogic.html#or). Then you choose an entity and which of its fields the query should return. After that, conditions or sub-groups can be added.
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If no expression tree is initially set, you start with creating a group of conditions linked with [`AND`]({environment:angularApiUrl}/enums/filteringlogic.html#and) or [`OR`]({environment:angularApiUrl}/enums/filteringlogic.html#or). After that, conditions or sub-groups can be added.
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In order to add a condition you select a field, an operand based on the field data type and a value if the operand is not unary. The operands `In` and `Not In` will allow you to create an inner query with conditions for a different entity instead of simply providing a value. Once the condition is committed, a chip with the condition information appears. By clicking the chip, you have the options to modify it or add another condition or group right after it.
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In order to add a condition, a field, an operand based on the field dataType and a value if the operand is not unary. Once the condition is committed, a chip with the condition information appears. By hovering or clicking the chip, you have the options to modify it or add another condition or group right after it.
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If you select more than one condition chip, a context menu appears with options to group or delete the current selection. If you choose to create a group with the selected conditions, the newly created group will appear where the topmost selected condition was placed.
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If you select more than one condition chip, a context menu appears with options to create a group or delete the queries. If you choose to create a group with the selected conditions, the newly created group will appear where the topmost selected condition was placed.
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In order to select a group, you can also click on its vertical line, which is colored based on the linking condition ([`AND`]({environment:angularApiUrl}/enums/filteringlogic.html#and) or [`OR`]({environment:angularApiUrl}/enums/filteringlogic.html#or)). If a single group is selected, you get a context menu with options to change its logic, ungroup or delete it.
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Since every condition is related to a specific field from a particular entity changing the entity will lead to resetting all preset conditions and groups. When selecting a new entity a confirmation dialog will be shown, unless the [`showEntityChangeDialog`]({environment:angularApiUrl}/classes/igxquerybuildercomponent.html#showEntityChangeDialog) input property is set to false.
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You can start using the component by setting the [`entities`]({environment:angularApiUrl}/classes/igxquerybuildercomponent.html#entities) property to an array describing the entity name and an array of its fields, where each field is defined by its name and data type. Once a field is selected it will automatically assign the corresponding operands based on the data type.
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You can start using the component by setting the [`fields`]({environment:angularApiUrl}/classes/igxquerybuildercomponent.html#fields) property to an array describing the field name and its data type. It will automatically assign the corresponding operands based on the data type.
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The Query Builder has the [`expressionTree`]({environment:angularApiUrl}/classes/igxquerybuildercomponent.html#expressionTree) input property. You could use it to set an initial state of the control and access the user-specified filtering logic.
The Ignite UI for Angular Query Builder Component allows defining templates for the component's header and the search value using the following predefined reference names:
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### Header
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Passing content inside of the `igx-query-builder-header` allows templating the query builder header. The [`IgxQueryBuilderHeaderComponent`]({environment:angularApiUrl}/classes/igxquerybuilderheadercomponent.html) provides a way to hide the legend by setting the [`showLegend`]({environment:angularApiUrl}/classes/igxquerybuilderheadercomponent.html#showLegend) input property to false.
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The code snippet below illustrates how to do this:
The search value of a condition can be templated using the [`igxQueryBuilderSearchValue`]({environment:angularApiUrl}/classes/igxquerybuildersearchvaluetemplatedirective.html) directive, applied to an `<ng-template>` inside of the `igx-query-builder`'s body:
We’ve created this Angular Query Builder example to show you the templating functionalities for the header and the search value of the Angular Query Builder component.
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