Arbitrary updates

Standard component actions may be insufficient for a particular use case. React Query Builder provides tools to augment or replace the standard methods.

Multiple action elements

The addRuleAction component adds a new rule to the current group when clicked, always using the default configuration. But your requirement may be to provide the user two buttons that add a rule with a different field selected depending on which button was clicked.

The example below uses a custom component that renders two buttons in the addRuleAction position, one for each field. The click event handler calls props.schema.getQuery() to retrieve the current query and props.schema.dispatchQuery() to update the query state appropriately for the given button.

import { useState } from 'react';
import {
  ActionElement,
  ActionProps,
  add,
  Field,
  QueryBuilder,
  RuleGroupType,
} from 'react-querybuilder';
import 'react-querybuilder/dist/query-builder.css';

const AddRulesAction = (props: ActionProps) => {
  const onClick = (field: string) => {
    props.schema.dispatchQuery(
      add(props.schema.getQuery(), { field, operator: '=', value: '' }, props.path)
    );
  };
  return (
    <>
      <ActionElement
        {...props}
        label="+ First Name Rule"
        handleOnClick={() => onClick('firstName')}
      />
      <ActionElement
        {...props}
        label="+ Last Name Rule"
        handleOnClick={() => onClick('lastName')}
      />
    </>
  );
};

const fields: Field[] = [
  { name: 'firstName', label: 'First Name' },
  { name: 'lastName', label: 'Last Name' },
];

const initialQuery: RuleGroupType = {
  combinator: 'and',
  rules: [],
};

export default () => {
  const [query, setQuery] = useState(initialQuery);

  return (
    <div>
      <QueryBuilder
        fields={fields}
        query={query}
        onQueryChange={setQuery}
        controlElements={{ addRuleAction: AddRulesAction }}
      />
    </div>
  );
};

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Custom query properties

Sometimes the structure of the query object is appropriate but doesn't carry enough information. You may need additional properties in the query hierarchy, and you probably want to update those properties from controls within the query builder. The example below uses a caseSensitive property on each rule, with a checkbox rendered beside the default value editor to update the property.

To further illustrate this scenario, the caseSensitive property is used by a custom rule processor for formatQuery. When caseSensitive is falsey, the field is augmented with a call to the SQL LOWER function and the value is converted to lowercase before being passed to the default rule processor.

The generated SQL and the raw query object are displayed below the query builder.

Related: Adding and removing query properties

import { useState } from 'react';
import {
  defaultRuleProcessorSQL,
  Field,
  formatQuery,
  QueryBuilder,
  RuleGroupType,
  RuleProcessor,
  update,
  ValueEditor,
  ValueEditorProps,
} from 'react-querybuilder';
import 'react-querybuilder/dist/query-builder.css';

const CaseSensitivityValueEditor = (props: ValueEditorProps) => {
  const onChange = () => {
    props.schema.dispatchQuery(
      update(props.schema.getQuery(), 'caseSensitive', !props.rule.caseSensitive, props.path)
    );
  };
  return (
    <>
      <ValueEditor {...props} />
      <label>
        <input type="checkbox" checked={!!props.rule.caseSensitive} onChange={onChange} />
        {' Case sensitive'}
      </label>
    </>
  );
};

const ruleProcessor: RuleProcessor = (rule, opts) => {
  if (!rule.caseSensitive) {
    return defaultRuleProcessorSQL(
      { ...rule, field: `LOWER(${rule.field})`, value: rule.value.toLocaleLowerCase() },
      opts
    );
  }
  return defaultRuleProcessorSQL(rule, opts);
};

const fields: Field[] = [
  { name: 'firstName', label: 'First Name' },
  { name: 'lastName', label: 'Last Name' },
];

const initialQuery: RuleGroupType = {
  combinator: 'or',
  rules: [
    { field: 'firstName', operator: '=', value: 'Adam', caseSensitive: true },
    { field: 'firstName', operator: '=', value: 'Eve', caseSensitive: false },
  ],
};

export default () => {
  const [query, setQuery] = useState(initialQuery);

  return (
    <div>
      <QueryBuilder
        fields={fields}
        query={query}
        onQueryChange={setQuery}
        controlElements={{ valueEditor: CaseSensitivityValueEditor }}
      />
      <pre>
        <code>{formatQuery(query, { format: 'sql', ruleProcessor })}</code>
      </pre>
      <pre>
        <code>{JSON.stringify(query, null, 2)}</code>
      </pre>
    </div>
  );
};

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