Modifying or deleting card properties
Modify a card property
Navigate to the Card properties page
- Sign in to Mingle as a project administrator and open the project you want to change (if you're not already working in the project).
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Click the Project admin tab.
Mingle displays the Project settings page.
if you are logged in as a project team member, Mingle displays the Team page.

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Click the Card properties link.
Mingle displays the Card properties page with all properties setup for this project.
What you can change in the Card properties page...
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Show / Hide - properties can be hidden if they are not required for data entry - for example calculated values used in reporting. Hidden card properties are conditional displayed in the card view (to show them check the Show hidden properties checkbox). Most users can only set the value by declaring a default value, or via a transition, or calculated if it's a formula property. Mingle and project admins can update hidden properties via the card view page.
You can also hide a property instead of deleting it, which will retain historical data about changes to that property.
- Lock / Unlock - any Managed List property can be locked, this restricts the set of allowed values to only those predefined by the Project Administrator, team members will not be able to dynamically add new values.
- Transition only? - indicates that the property can only have its value set via a transition, it will not be directly editable.
Editing the details of a card property...
Click the Edit link next to the card property you wish to modify.
Mingle displays the Edit property definition page.
The things you can edit depend on the type of property you chose
You can't change the property type here. If you've accidentally created the property with the incorrect type - you will need to delete it and recreate a new property with the same name.
You can always change the name and description of a property, however do consider whether you should be renaming an existing property or creating a new one.
Effects of renaming a property
- The name will be changed in any card types using the property
- Any MQL which referenced the original property name will display an error, this may affect charts and tables
- Any Formula property which referenced the original property name will be updated to reference the new name
- Any Favorite which used the original property name in a filter condition will be changed to use the new name
- Any Transition which used the original property name in its 'has' or 'set' clause will be changed to use the new name
- Any Aggregate properties which referenced the original property name will be updated to reference the new name
For Managed list properties - you can change the list of allowed values by clicking on the Edit values
For Formula properties - you can change the formula definition and select whether or not to replace numeric (not set) values with zero when calculating the result of the formula.

Aggregate properties and relationship properties are separately defined as part of a card tree, see Modifying or deleting aggregate properties and Modifying card trees for details.
Delete a card property
Navigate to the Card properties page
- Sign in to Mingle as a project administrator and open the project you want to change (if you're not already working in the project).
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Click the Project admin tab.
Mingle displays the Project settings page.
if you are logged in as a project team member, Mingle displays the Team page.

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Click the Card properties link.
Mingle displays the Card properties page with all properties set up for this project.
Delete the property...
Click the Delete link next to the card property you wish to delete.
Deletion is not possible if:
- The property is referenced by a formula property.
Mingle will display the Delete property confirmation page
Click on the Continue to delete to permanently delete the property
Deletion of a card property is an unrecoverable action (short of restoring from a database backup). You should consider the consequences of deleting a property, and if you are in any doubt it may be safer to use the hide property feature instead of deleting.
The effects of deleting a property...
Cards using the property
- The property will be removed from any cards which were using it, and the values will be deleted.
History view
- The property will be removed from all cards and values for that property will no longer be displayed in history.
- Any card versions which contained only changes to this property will no longer appear in history
Card transitions
- Any card transitions which reference the property as a 'has' value or which assign a value to the property will be deleted
Favorites and tabs
- Favorites that include the deleted property as a display column or in a filter condition will be deleted
- Any tabs based on those favorites will also be deleted
Pages
- Mingle pages and tables/charts that reference the deleted property will no longer work. The MQL syntax will not be changed, so you will need to manually alter any affected pages to remove references to the deleted property.
A fast way to find all of the pages which use the card property in MQL is to use the Mingle search.
Simply type in the name of the card property e.g. "some property" and hit the Search
Mingle will show all pages referencing the card property - you can then open each of these pages for editing and make the appropriate changes.
Note that if your property name is a common word or phrase - you may get some additional pages that contain that word outside of MQL statements.
Aggregate properties
- Aggregate properties which operate on the deleted property will also be deleted.
- Consequently - any pages, Favorites, Tabs or Feeds which reference the aggregate property will also be affected.
Formula properties
- It's not possible to delete a component property (referenced in the formula definition) of a Formula property. The property has to be removed from the formula definition before it can be deleted.
Externally stored bookmarks
- Externally stored URLs will become invalid if they included the original property name. This may affect browser bookmarks that users have made to quickly navigate to specific card views.
Subscribed atom feeds
- Previously subscribed atom feeds that use the deleted property will no longer provide new data