MultiDropdownRange

MultiDropdownRange creates a dropdown based multiple numeric range UI component that is connected to a database field.

Note

It is exactly like the MultiRange component but displayed in 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

<MultiDropdownRange
	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

<MultiDropdownRange
  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', 'Moderate']}
  placeholder="Select price ranges"
  showFilter={true}
  filterLabel="Price"
  URLParams={false}
  includeNullValues
  endpoint={{
    url:"https://appbase-demo-ansible-abxiydt-arc.searchbase.io/recipes-demo/_reactivesearch.v3", //mandatory
    headers:{
      // relevant headers
    },
    method: 'POST'
  }}        
/>

Usage as a controlled component

function Index(props) {
	const [values, setValues] = useState([]);
	return (
		<MultiDropdownRange
			componentId="BookSensor"
			dataField="average_rating"
			data={[
				{
					start: 0,
					end: 3,
					label: 'Rating < 3',
				},
				{
					start: 3,
					end: 4,
					label: 'Rating 3 to 4',
				},
				{
					start: 4,
					end: 5,
					label: 'Rating > 4',
				},
			]}
			value={values}
			onChange={setValues}
		/>
	);
}

Props

componentId

unique identifier of the component, can be referenced in other components' react prop.

endpoint

endpoint prop provides the ability to query a user-defined backend service for this component, overriding the data endpoint configured in the ReactiveBase component. Works only when enableAppbase is true. Accepts the following properties:

• url String [Required] URL where the data cluster is hosted.
• headers Object [optional]
  set custom headers to be sent with each server request as key/value pairs.
• method String [optional]
  set method of the API request.
• body Object [optional]
  request body of the API request. When body isn't set and method is POST, the request body is set based on the component's configured props.

• Overrides the endpoint property defined in ReactiveBase.
• If required, use transformResponse prop to transform response in component-consumable format.

dataField

data field to be connected to the component's UI view. The range items are filtered by a database query on this field.

data

collection of UI labels with associated start and end range values.

nestedField

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

title of the component to be shown in the UI.

defaultValue

selects initial items from the data range on mount.

value

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

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

placeholder to be displayed in the select box. It'll be only applicable when no value is selected. Defaults to Select a value.

searchPlaceholder

placeholder to be displayed in the search box. Defaults to Type here to search....

showFilter

show as filter when a value is selected in a global selected filters view. Defaults to true.

filterLabel

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

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

can be used to change the label of the dropdown. Useful for adding highlighting/styling to or translating the label.

renderLabel={(items) => Object.values(items).map((item) => (
  <div>
    <MyTranslationComponent key={item} />
  </div>
))}

includeNullValues

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

MultiDropdownRange component supports innerClass prop with the following keys:

• title
• select
• list
• icon

Read more about it here.

Extending

MultiDropdownRange component can be extended to

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

<MultiDropdownRange
  ...
  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

CSS class to be injected on the component container.

style

CSS styles to be applied to the MultiDropdownRange component.

customQuery

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 MultiDropdownRange component as long as the component is a part of react dependency of at least one other component.

beforeValueChange

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:

beforeValueChange = value => {
    // The update is accepted by default
  const valueIndex = value.findIndex(val => val.start < 4);
  if (valueIndex > -1) {
    // To reject the update, throw an error
    throw Error('Rating should be greater than or equal to 4.');
  }
};

onValueChange

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(s) when range item(s) is/are selected in a "Prices" MultiDropdownRange.

onQueryChange

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

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.

Examples

MultiDropdownRange with default props