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Expression Editor

ExpressionEditorUtil

Source: oroform/js/expression-editor-util.

Implements core autocomplete and validate functionality for expressions.

You can configure allowed expression syntax by options.

Contains the following public functions:

validate - Validates expression syntax
getAutocompleteData - Builds autocomplete data by expression and cursor position
updateAutocompleteItem - Inserts a new item into autocomplete data
updateDataSourceValue - Sets a new data source value into autocomplete data

ExpressionEditorView

Source: oroform/js/app/views/expression-editor-view.

Used ExpressionEditorUtil and typeahead widget to provide autocomplete and validate the UI for text fields.

How to Use

Use ExpressionEditorView for text fields:

{{ form_widget(form.expression, {'attr': {
    'data-page-component-module': 'oroui/js/app/components/view-component',
    'data-page-component-options': initializeOptions|merge({
        view: 'oroform/js/app/views/expression-editor-view',
    })
}}) }}

Use ExpressionEditorUtil for form validation:

var ExpressionEditorUtil = require('oroform/js/expression-editor-util');
var expressionEditorUtil = new ExpressionEditorUtil(initializeOptions);
expressionEditorUtil.validate();

Validation

For validation, we transform expression into safe native JS code and execute it.

For transformation, we use ExpressionEditorUtil.itemToNativeJS property and a list of allowed and not allowed words/symbols, see ExpressionEditorUtil.regex.nativeReplaceAllowedBeforeTest and ExpressionEditorUtil.regex.nativeFindNotAllowed.

Options

Both util and view expect same initialize options. The most important of them are:

Operations groups, a list of all supported operations. Default value:

operations: {
    math: ['+', '-', '%', '*', '/'],
    bool: ['and', 'or'],
    equality: ['==', '!='],
    compare: ['>', '<', '<=', '>='],
    inclusion: ['in', 'not in'],
    like: ['matches']
}

Allowed operations groups. Default value:

allowedOperations: ['math', 'bool', 'equality', 'compare', 'inclusion', 'like']

Entities and fields that you can use. Does not have a default value, you should specify it for each view or util. Format:

entities: {
    root_entities: {
        "Oro\\Bundle\\ProductBundle\\Entity\\Product": "product",
        "Oro\\Bundle\\PricingBundle\\Entity\\PriceList": "pricelist"
    },
    fields_data: {
        "Oro\\Bundle\\ProductBundle\\Entity\\Product": {
            id: {
                label: "Id",
                type: "integer"
            },
            category: {
                label: "Category",
                type: "relation",
                relation_alias: "Oro\\Bundle\\CatalogBundle\\Entity\\Category"
            },
            ...
        },
        "Oro\\Bundle\\CatalogBundle\\Entity\\Category": {
            id: {
                label: "Id",
                type: "integer"
            },
            ...
        }
        "Oro\\Bundle\\PricingBundle\\Entity\\PriceList": {...}
    }
}

Limit of nested entities level. For example, if you set this option to 1, category will be excluded from the allowed items list. Default value:
```
itemLevelLimit: 3
```

Widgets to choose specific entities. This widget will be rendered when you type pricelist. Format:

dataSource: {
    pricelist: "<select><option value='1'>Option 1</option><option value='2'>Option 2</option><option value='3'>Option 3</option></select>"
}