Reactive Component

We have built this library keeping you, the developer, in mind. If you’re here, it is obvious that you want to create a custom component that is reactive in nature. Perhaps, you already have a component in your design kit and want it to work seamlessly with Reactivesearch.

With ReactiveComponent, you can convert any React Component into a Reactivesearch component i.e. your react component will be able to talk to other Reactivesearch components and connect with your elasticsearch cluster seamlessly.

How does this work?

ReactiveComponent is a wrapper component that allows you to connect custom component(s) (passed as children) with the Reactivesearch ecosystem.

Usage with defaultQuery

For example, let’s suppose that we are building an e-commerce store where we have a react component called ColorPicker which renders the colors passed to it as tiles, allowing us to filter the products by their colors.

<ColorPicker
    colors={['#000', '#666', '#fff']}
    onChange={this.handleColorChange}
>

Now, let’s assume that we have all these hex-codes stored as keywords in an Elasticsearch index. To display each unique color tile, we can run a terms aggregations query. The defaultQuery prop of ReactiveComponent allows us to do this and pass the results to a child component.

<ReactiveComponent
    componentId="myColorPicker"   // a unique id we will refer to later
    defaultQuery={() => ({
        aggs: {
            color: {
                terms: {
                    field: 'color'
                }
            }
        }
    })}
    render={({ aggregations, setQuery }) => (
            <ColorPickerWrapper
                aggregations={aggregations}
                setQuery={setQuery}
            />
        )}
/>

Note

It is also possible to use render function as children

The above snippet runs the defaultQuery passed to the ReactiveComponent when the component gets mounted and consequently pass the query results to the ColorPickerWraper component (i.e. child component of ReactiveComponent) as the following two props: data and aggregations.

class ColorPickerWrapper extends React.Component {

    render() {
        let colors = [];

        if (
            // checking for when component gets the aggregation results
            this.props.aggregations
            && this.props.aggregations.colors
            && this.props.aggregations.colors.buckets.length
        ) {
            colors = this.props.aggregations.map(color => color.key);
        }

        return (
            <ColorPicker
                colors={colors}
                onChange={() => {
                    // handles color change
                    // we will define this in the next step
                }}
            />
        )
    }
}

Up until this point, we have figured out how to display the colored tiles by running an Elasticsearch query and passing the results to our ColorPickerWrapper component.

But we also need to be able to filter the products by a color tile when selected by the end-user. This is where setQuery() prop comes in handy. It takes an object param of shape:

{
    query: {},
    value: ''
}

where,

• query - is the query of the component,
• value - can be an array, string or number (This will be shown in selected filters and URLParams if active. In our case, this is the hex-code of the selected color tile)

In our current example, we would simply have to call this.props.setQuery() with the updated query and value of the component:

class ColorPickerWrapper extends React.Component {
    render() {
        let colors = [];

        if (
            // checking for when component gets the aggregation results
            this.props.aggregations
            && this.props.aggregations.colors
            && this.props.aggregations.colors.buckets.length
        ) {
            colors = this.props.aggregations.map(color => color.key);
        }

        return (
            <ColorPicker
                colors={colors}
                onChange={(newColor) => {     // handles color change
                    const query = {
                        query: {
                            term: { color: newColor }
                        }
                    };

                    this.props.setQuery({
                        query,
                        value: newColor
                    })
                }}
            />
        )
    }
}

Now, the components which will have myColorPicker present in their react prop can react to the changes in the ColorPicker component based on the query passed to the setQuery method. You can check a similar example implementation here.

Usage with customQuery

Let’s suppose - we are building an e-commerce store for cars which displays a list of cars of a particular brand on their separate page as example.com/cars/nissan. Now, we want all the filters on that page (like pricing, type of car, model, year, etc) to only show the data relevant to the given brand (i.e. nissan). In this case, ReactiveComponent can be used with customQuery to achieve the desired behavior easily.

We can then use the given ReactiveComponent to be watched by all the filters (via react prop) to avail the desired brand based filtering for all the filters.

Check demo here.

Parameters available in render prop function

• loading boolean indicates that the query is still in progress
• error: object An object containing the error info
• data Array data prop is an array of parsed results(hits) from the Elasticsearch query of the component.
• rawData Array rawData prop is an array of original results(hits) from the Elasticsearch query of the component.
• aggregations Object aggregations prop contains the results from aggs Elasticsearch query of the component.

• setQuery function setQuery function sets the query of the component. It takes an object param of shape:

  {
      query: {}, // query of the component
  	value: '',  // value of the component
  	options: {}, // query options for e.g size, timeout & includeFields etc.
  }

• value any value contains the current value of the component (which can be set via setQuery() function). This is used for URLParams and SelectedFilters.

Props

• className String CSS class to be injected on the component container.

• style Object CSS styles to be applied to the DataSearch component.

• defaultQuery Function returns the default query to be applied to the component, as defined in Elasticsearch Query DSL.

• customQuery Function returns the custom query to be applied to the component, as defined in Elasticsearch Query DSL. Custom query can be used to change the component’s behavior for its subscribers.

• 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.

• onData Function callback function which provides data, rawData and aggregations as function params.

• 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.

• react Object react prop is available in components whose data view should reactively update when on or more dependent components change their states, e.g. ReactiveMap, ReactiveList.

  • key String one of and, or, not defines the combining clause.

    • and clause implies that the results will be filtered by matches from all of the associated component states.
    • or clause implies that the results will be filtered by matches from at least one of the associated component states.
    • not clause implies that the results will be filtered by an inverse match of the associated component states.

  • value String or Array or Object

    • String is used for specifying a single component by its componentId.
    • Array is used for specifying multiple components by their componentId.
    • Object is used for nesting other key clauses.

• 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.

Examples

ReactiveComponent with defaultQuery

ReactiveComponent with customQuery

See storybook for ReactiveComponent on playground.

A custom component using ReactiveComponent