Appbase.io Docs - Search stack for Elasticsearch

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SingleDropdownRange creates a dropdown based numeric range UI component.

Note

This component is exactly like the SingleRange component except the UI is based on a dropdown, ideal for showing additional UI filters while conserving screen space.

Example uses:

filtering search results by prices in an e-commerce or food delivery experience.
browsing movies by a ratings filter.

Usage

Basic Usage

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<SingleDropdownRange
	componentId="PriceSensor"
	dataField="price"
	data={[
		{ start: 0, end: 10, label: 'Cheap' },
		{ start: 11, end: 20, label: 'Moderate' },
		{ start: 21, end: 50, label: 'Pricey' },
		{ start: 51, end: 1000, label: 'First Date' },
	]}
	title="Prices"
/>

Usage With All Props

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<SingleDropdownRange
	componentId="PriceSensor"
	dataField="price"
	data={[
		{ start: 0, end: 10, label: 'Cheap' },
		{ start: 11, end: 20, label: 'Moderate' },
		{ start: 21, end: 50, label: 'Pricey' },
		{ start: 51, end: 1000, label: 'First Date' },
	]}
	title="Prices"
	defaultValue="Cheap"
	placeholder="Select price range"
	showFilter={false}
	filterLabel="Price"
	URLParams={false}
	includeNullValues
/>

Props

componentId String unique identifier of the component, can be referenced in other components' react prop.
dataField String data field to be connected to the component's UI view. The range items are filtered by a database query on this field.
data Object Array collection of UI labels with associated start and end range values.
nestedField String [optional] use to set the nested mapping field that allows arrays of objects to be indexed in a way that they can be queried independently of each other. Applicable only when dataField is a part of nested type.
title String or JSX [optional] title of the component to be shown in the UI.
defaultValue String [optional] select initial item from the data array on mount.
value String [optional] controls the current value of the component. It selects the item from the data (on mount and on update). Use this prop in conjunction with onChange function.
onChange function [optional] is a callback function which accepts component's current value as a parameter. It is called when you are using the value prop and the component's value changes. This prop is used to implement the controlled component behavior.
placeholder String [optional] placeholder to be displayed in the select box. It'll be only applicable when no value is selected. Defaults to Select a value.
searchPlaceholder String [optional] placeholder to be displayed in the search box. Defaults to Type here to search....
showFilter Boolean [optional] show as filter when a value is selected in a global selected filters view. Defaults to true.
filterLabel String [optional] An optional label to display for the component in the global selected filters view. This is only applicable if showFilter is enabled. Default value used here is componentId.
URLParams Boolean [optional] enable creating a URL query string parameter based on the selected value of the list. This is useful for sharing URLs with the component state. Defaults to false.
renderLabel Function [optional] can be used to change the label of the dropdown. Useful for adding highlighting/styling to or translating the label.

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```
renderLabel={(items) => Object.values(items).map((item) => (
  <div>
    <MyTranslationComponent key={item} />
  </div>
))}
```
includeNullValues Boolean [optional] If you have sparse data or document or items not having the value in the specified field or mapping, then this prop enables you to show that data. Defaults to false.

Demo

Styles

SingleDropdownRange component supports innerClass prop with the following keys:

title
select
list
icon

Extending

SingleDropdownRange component can be extended to

customize the look and feel with className, style,
update the underlying DB query with customQuery,
connect with external interfaces using beforeValueChange, onValueChange and onQueryChange.

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<SingleDropdownRange
  ...
  className="custom-class"
  style={{"paddingBottom": "10px"}}
  customQuery={
    function(value, props) {
      return {
        query: {
            match: {
                data_field: "this is a test"
            }
        }
      }
    }
  }
  beforeValueChange={
    function(value) {
      // called before the value is set
      // returns a promise
      return new Promise((resolve, reject) => {
        // update state or component props
        resolve()
        // or reject()
      })
    }
  }
  onValueChange={
    function(value) {
      console.log("current value: ", value)
      // set the state
      // use the value with other js code
    }
  }
  onQueryChange={
    function(prevQuery, nextQuery) {
      // use the query with other js code
      console.log('prevQuery', prevQuery);
      console.log('nextQuery', nextQuery);
    }
  }
/>

className String CSS class to be injected on the component container.
style Object CSS styles to be applied to the SingleDropdownRange component.
customQuery Function takes value and props as parameters and returns the data query to be applied to the component, as defined in Elasticsearch Query DSL. Note: customQuery is called on value changes in the SingleDropdownRange component as long as the component is a part of react dependency of at least one other component.
beforeValueChange Function is a callback function which accepts component's future value as a parameter and returns a promise. It is called everytime before a component's value changes. The promise, if and when resolved, triggers the execution of the component's query and if rejected, kills the query execution. This method can act as a gatekeeper for query execution, since it only executes the query after the provided promise has been resolved.

Note:

If you're using Reactivesearch version >= 3.3.7, beforeValueChange can also be defined as a synchronous function. value is updated by default, unless you throw an Error to reject the update. For example:

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```
beforeValueChange = value => {
    // The update is accepted by default
	if (value.start < 4) {
		// To reject the update, throw an error
		throw Error('Rating must be greater than or equal to 4.');
	}
};
```
onValueChange Function is a callback function which accepts component's current value as a parameter. It is called everytime the component's value changes. This prop is handy in cases where you want to generate a side-effect on value selection. For example: You want to show a pop-up modal with the valid discount coupon code when a range item is selected in a "Prices" SingleDropdownRange.
onQueryChange Function is a callback function which accepts component's prevQuery and nextQuery as parameters. It is called everytime the component's query changes. This prop is handy in cases where you want to generate a side-effect whenever the component's query would change.
index String [optional] The index prop can be used to explicitly specify an index to query against for this component. It is suitable for use-cases where you want to fetch results from more than one index in a single ReactiveSearch API request. The default value for the index is set to the app prop defined in the ReactiveBase component.

Note: This only works when enableAppbase prop is set to true in ReactiveBase.