PersistentFile

Represents the common ancestor for all persistent files that are available in YouTrack.

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}
charset	String	Read-only. The charset type of the file. Only applicable to text files. Available since 2019.2.53994
extension	String	Read-only. The extension that defines the file type.
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. 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
mimeType	String	Read-only. The MIME type of the file. Available since 2019.2.53994
name	String	Read-only. The name of the file.
size	Number	Read-only. The size of the attached file in bytes.

Methods

findByExtensionProperties

static findByExtensionProperties(extensionPropertiesQuery)

Searches for PersistentFile entities with extension properties that match the specified query.

Available since 2024.3.43260

Parameters

Name	Type	Description
extensionPropertiesQuery	Object	The extension properties query, defined as a set of key-value pairs representing properties and their corresponding values.

Return Value

Type	Description
Set .< PersistentFile >	The set of PersistentFile entities that contain the specified extension properties.

Example

{ property1: "value1", property2: "value2" }

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`.

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`.

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`.

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`.

10 September 2026