ProjectCustomField

Represents a custom field that is available in a project.

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 runOn: {removal: true}
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 https://www.jetbrains.com.cn/en-us/help/youtrack/devportal/apps-extension-properties.html. Available since 2024.3 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
localizedName	String	Read-only. The localized name of the field.
name	String	Read-only. The name of the field.
nullValueText	String	Read-only. The text that is displayed for this field when it is empty.
typeName	String	Read-only. The data type assigned to values stored in the custom field.

Methods

becomes

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`.

becomesInvisibleInIssue

becomesInvisibleInIssue(issue)

Checks if the changes that are applied in the current transaction remove the condition to show the custom field.

Available since 2018.2.42312

Parameters

Name	Type	Description
issue	Issue	The issue for which the condition for showing the field is checked.

Return Value

Type	Description
Boolean	When `true`, the condition for showing the field is removed in the current transaction.

becomesVisibleInIssue

becomesVisibleInIssue(issue)

Checks if the changes that are applied in the current transaction satisfy the condition to show the custom field.

Available since 2018.2.42312

Parameters

Name	Type	Description
issue	Issue	The issue for which the condition for showing the field is checked.

Return Value

Type	Description
Boolean	When `true`, the condition for showing the field is met in the current transaction.

canBeReadBy

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	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

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	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`.

getBackgroundColor

getBackgroundColor(issue)

Returns the background color that is used for this field value in the specified issue. Can return `null`, `"white"`, or a hex color presentation.

Parameters

Name	Type	Description
issue	Issue	The issue for which the background color is returned.

Return Value

Type	Description
String	The background color that is used for this field value in the specified issue.

getForegroundColor

getForegroundColor(issue)

Returns the foreground color that is used for this field value in the specified issue. Can return `null`, `"white"`, or a hex color presentation.

Parameters

Name	Type	Description
issue	Issue	The issue for which the foreground color is returned.

Return Value

Type	Description
String	The foreground color that is used for this field value in the specified issue.

getValuePresentation

getValuePresentation(issue)

Returns the string presentation of the value that is stored in this field in the specified issue.

Parameters

Name	Type	Description
issue	Issue	The issue for which the value presentation is returned.

Return Value

Type	Description
String	The string presentation of the value.

is

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

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`.

isVisibleInIssue

isVisibleInIssue(issue)

Checks if a field is visible in the issue.

Available since 2018.2.42312

Parameters

Name	Type	Description
issue	Issue	The issue for which the condition for showing the field is checked.

Return Value

Type	Description
Boolean	When `true`, the condition for showing the custom field in the issue has been met. It can also mean that the field is not shown on a conditional basis and is always visible.

Example

// The following example checks the issue to see whether a conditional field with the name "Related Activity"
// is currently visible, meaning that the conditions for showing the field have been met.
// If so, the value for the field is set to "Attendance"

action: function (ctx) {
  if (ctx.RelatedActivity.isVisibleInIssue(ctx.issue)) {
    ctx.issue.fields.RelatedActivity.add(ctx.RelatedActivity.Attendance);
  }
},
requirements: {
  RelatedActivity: {
    name: 'Related Activity',
    type: entities.EnumField.fieldType,
    multi: true,
    Attendance: {}
  }
}

oldValue

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

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

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`.

22 November 2025