DynamicQueryFacetGenerator

Generates Facets dynamicaly based upon results from the index.

First the fields from the current index are retrieved (so that the component knows which fields are facets). These fields are stored in localstorage (so it only happens once a week).

Second when a query is being executed, the facet cache is checked. If the query is in the cache the facets will be retrieved from cache. If not, then a query is being executed against the index. The first number of results are being examined for facet values. If the treshold is met, and the distinct values are bigger then 1, the facet is added to the UI.

Another possibility is to use a push source query. This means: you must have a push source with QUERY + FACETS in them. This gives a bit better performance.

Disclaimer: This component was built by the community at large and is not an official Coveo JSUI Component. Use this component at your own risk.

Getting Started

1. Install the component into your project.

npm i @coveops/dynamic-query-facet-generator

2. Use the Component or extend it

Typescript:

import { DynamicQueryFacetGenerator, IDynamicQueryFacetGeneratorOptions } from '@coveops/dynamic-query-facet-generator';

Javascript

const DynamicQueryFacetGenerator = require('@coveops/dynamic-query-facet-generator').DynamicQueryFacetGenerator;

3. You can also expose the component alongside other components being built in your project.

export * from '@coveops/dynamic-query-facet-generator'

4. Include the component in your template as follows:

Place the component in your markup:

<div class="CoveoDynamicQueryFacetGenerator"></div>

Usage

Add the CoveoDynamicQueryFacetGenerator along with the rest of the Facets.

<div class="coveo-facet-column">
  <div class="CoveoDynamicFacetManager">
    <div class="CoveoDynamicFacet" data-field="@prd_brand" data-title="Brand"></div>
    <div class="CoveoDynamicFacet" data-field="@prd_category" data-title="Category Type"></div>
    <div class="CoveoDynamicQueryFacetGenerator" data-depends-on="@prd_category"></div>
  </div>
</div>

Before you initialize the UI, make sure you pass the facet fields dictionary to the DynamicQueryFacetGenerator component

document.addEventListener('DOMContentLoaded', function () {
  Coveo.SearchEndpoint.configureSampleEndpointV2();
  Coveo.init(document.body, {
    DynamicQueryFacetGenerator: {
      dictionary: {
        "computer": "Computer Name",
        "phone": "Phone"
      },
      queryToExecute: "@source==BBQs",
      noOfResults: 25
    }
  });
})

Transform

There is a public transform method available to transform the fieldname into a title.

Dictionary

The dictionary is used to transform the field name into a proper title.

Blacklist

If certain facets should never be shown. Add them to the blacklist.

Options

The following options can be configured:

Option	Required	Type	Default	Notes
queryToExecute	No	string	``	Query to execute to fetch the facet values.
noOfResults	No	number	15	How many results must be examines when checking for facet values. Recommendation: 15
noOfFacets	No	number	10	How many facets must be added to the UI
dependsOn	No	string	``	Which other facet does this component rely on. Only when this facet has a selection the facets will be added.
debug	No	boolean	false	Show the timing information for the facet requests.
useAdvancedQuery	No	boolean	false	Must the advanced query (the facet selections) also be used to retrieve the facets.
useOnlyUserFields	No	boolean	true	When retrieving facet fields from the index. Only use 'User' defined fields. Else 'System' fields will also be used.
usePush	No	boolean	false	Use the Push approach (query the index on a specific push source). Make sure that the queryToExecute points to the push source. This will use the getValues of the defined facet (pushGroupField)
usePushAsQuery	No	boolean	false	Use the Push approach (but examine the query instead of using the getValues method)
pushGroupField	No	string		Field needed for the usePush method
tresholdPercentage	No	number	30	A facet is only considered if it is present on tresholdPercentage% of the results
blacklist	No	string	field1,field2,field3	The fields which should not be added to the UI
dictionary	No	string	``	See above for instructions

Extending

Extending the component can be done as follows:

import { DynamicQueryFacetGenerator, IDynamicQueryFacetGeneratorOptions } from "@coveops/dynamic-query-facet-generator";

export interface IExtendedDynamicQueryFacetGeneratorOptions extends IDynamicQueryFacetGeneratorOptions {}

export class ExtendedDynamicQueryFacetGenerator extends DynamicQueryFacetGenerator {}

Contribute

1. Clone the project
2. Copy .env.dist to .env and update the COVEO_ORG_ID and COVEO_TOKEN fields in the .env file to use your Coveo credentials and SERVER_PORT to configure the port of the sandbox - it will use 8080 by default.
3. Build the code base: npm run build
4. Serve the sandbox for live development npm run serve