Block a transition if the type of the attached files is incorrect

Use case

Evaluate if the type of files in the Attachments field is the one specified.

This use case is valid for both conditions and validators . The only difference is that you can specify an additional error message when using a validator.

⚒️ Configuration

Jira expression*

Bash

issue?.attachments.every(attachment => attachment.mimeType == "image/jpeg")

All of the attachments of the current issue must be in JPEG format.

If you need to evaluate if the type of files are in other format replace image/jpeg with the following expressions:

application/pdf for PDF files,
image/png for PNG files,
video/mp4 for MP4 files and
binary/octet-stream for log files.

Variations

Jira expression*

Bash

issue?.attachments.every(attachment => attachment.filename.includes(".docx"))

All of the attachments are DOCX files. The expression for this type of file is different from the previous ones.

Jira expression*

Bash

issue?.attachments.some(attachment => attachment.mimeType == "image/jpeg")

Some of the attachments are JPEG files.

Jira expression*

Bash

issue.attachments.filter(attachment => attachment.filename == issue.customfield_10001 + "_Attached_File.pdf").length != 0

At least one of the attachments follows a naming convention. The name of the file is composed of the option selected in a custom field plus a fixed text and the file type.

📚 Related use cases

Use case	Workflow function	Use case description
Block a transition based on issue links	Jira expression condition Jira expression validator	Evaluate issue links and hide transitions based on the outcome. This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.
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Check current issue status	Jira expression condition Jira expression validator	Check whether the current issue is in a particular status. This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.
Check for unresolved sub-tasks	Jira expression condition Jira expression validator	Check whether the current issue has any unresolved sub-tasks. This is particularly important if you want to block a parent issue as long as work is still being done on related sub-tasks. This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.
Check if an attachment was added recently	Jira expression condition Jira expression validator	Make sure that the current user has uploaded a attachment during a definite period of time. This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.
Check parent issue type	Jira expression condition Jira expression validator	Check whether the parent of the current issue is of a certain issue type. This is particularly important if you want to reuse a workflow for multiple sub-task issue types but only want a transition to be available if the sub-task belongs to a certain user story or a bug. This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.
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Evaluate the Parent field	Jira expression condition Jira expression validator	Evaluate different values of the issue in the Parent Link field of the transitioned issue. This use case is valid for both conditions and validators . The only difference is that you can specify an additional error message when using a validator.
Evaluate worklogs in sub-tasks	Jira expression condition Jira expression validator	Evaluate if work has been logged in a sub-task to prevent transitioning the parent issue when no work has been logged. This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.
Validate an issue only if a comment is written during the transition	Jira expression validator	Evaluate the comments and block transitions based on the outcome. This use case is only valid for validators as it involves making changes during a transition. An additional error message can be added.
Validate worklogs	Jira expression condition Jira expression validator	Evaluate if a user has logged more than a certain amount of time in the latest worklog.