# UserCondition Represents a value-based condition for a custom field in a specific project, where the field stores references to a user. Extends [BaseEntity](v1-BaseEntity.html). Available since 2025.3 ## Properties | Name | Type | Description | | --- | --- | --- | | becomesRemoved | Boolean | Read-only.  When `true`, the entity is removed in the current transaction. Otherwise, `false`. This property can become `true` only in on-change rules when the rule is triggered on the removal of an issue or an article. In the rule code, the `runOn` rule property must contain the `removal` parameter set to `true`. Available since 2017.4.37915 ```JAVASCRIPT runOn: {removal: true} ``` | | bundleElement | [Field](v1-Field.html) | Read-only.  The value of the field that is used to determine the set of `possibleValues` in the conditional field. Available since 2025.3 | | extensionProperties | Object | The object containing extension properties for this entity and their values. Extension properties are custom properties that might be added to core YouTrack entities by an app. For details about extension properties, see [Extension Properties](apps-extension-properties.html). Available since 2024.3 ```JAVASCRIPT const entities = require('@jetbrains/youtrack-scripting-api/entities'); exports.rule = entities.Issue.action({ command: 'test', action: function (ctx) { const printValues = () => { return 'stringProp:' + ctx.issue.extensionProperties.stringProp + ';' + 'integerProp:' + ctx.issue.extensionProperties.integerProp + ';' + 'booleanProp:' + ctx.issue.extensionProperties.booleanProp + ';' + 'issueProp:' + ctx.issue.extensionProperties.issueProp?.id + ';' + 'issuesProp:' + ctx.issue.extensionProperties.issuesProp?.first()?.id + ';' } ctx.issue.addComment(printValues()); } }); ``` | | isNew | Boolean | Read-only.  When `true`, the entity is created in the current transaction. Otherwise, `false`. Available since 2018.2.42351 | | possibleValues | [Set](v1-Set.html).<[User](v1-User.html)> | Read-only.  The set of possible user values for the conditional field. Available since 2025.3 | ## Methods ### becomes ```JAVASCRIPT becomes(fieldName, expected) ``` Checks whether a field is set to an expected value in the current transaction. Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field to check. | : | expected | string | The expected value. | Return Value : | Type | Description | : | --- | --- | : | boolean | If the field is set to the expected value, returns `true`. | ### canBeReadBy ```JAVASCRIPT canBeReadBy(fieldName, user) ``` Checks whether a user has permission to read the field. Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field. | : | user | [User](v1-User.html) | The user for whom the permission to read the field is checked. | Return Value : | Type | Description | : | --- | --- | : | boolean | If the user can read the field, returns `true`. | ### canBeWrittenBy ```JAVASCRIPT canBeWrittenBy(fieldName, user) ``` Checks whether a user has permission to update the field. Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field. | : | user | [User](v1-User.html) | The user for whom the permission to update the field is checked. | Return Value : | Type | Description | : | --- | --- | : | boolean | If the user can update the field, returns `true`. | ### is ```JAVASCRIPT is(fieldName, expected) ``` Checks whether a field is equal to an expected value. Available since 2019.2.55603 Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field to check. | : | expected | string | The expected value. | Return Value : | Type | Description | : | --- | --- | : | boolean | If the field is equal to the expected value, returns `true`. | ### isChanged ```JAVASCRIPT isChanged(fieldName) ``` Checks whether the value of a field is changed in the current transaction. Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field to check. | Return Value : | Type | Description | : | --- | --- | : | boolean | If the value of the field is changed in the current transaction, returns `true`. | ### oldValue ```JAVASCRIPT oldValue(fieldName) ``` Returns the previous value of a single-value field before an update was applied. If the field is not changed in the transaction, returns `null`. Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field. | Return Value : | Type | Description | : | --- | --- | : | Object | If the field is changed in the current transaction, the previous value of the field. Otherwise, `null`. | ### required ```JAVASCRIPT required(fieldName, message) ``` Asserts that a value is set for a field. If a value for the required field is not set, the specified message is displayed in the user interface. Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field to check. | : | message | string | The message that is displayed to the user that describes the field requirement. | ### was ```JAVASCRIPT was(fieldName, expected) ``` Checks whether a field was equal to an expected value prior to the current transaction. Available since 2019.2.55603 Parameters : | Name | Type | Description | : | --- | --- | --- | : | fieldName | string | The name of the field to check. | : | expected | string | The expected value. | Return Value : | Type | Description | : | --- | --- | : | boolean | If the field was equal to the expected value, returns `true`. | ## See also [BaseEntity](v1-BaseEntity.html) [Field](v1-Field.html) [Extension Properties](apps-extension-properties.html) [Set](v1-Set.html) [User](v1-User.html)