On Save

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Rules and examples

On Save icon.PNG Rules are client-side scripts (no-code business logic) that are executed when a user of the mobile app interacts with the app. The On Save rules are checked when you save a record. Rules are managed using the rules editor, usually in Woodford.
On Save rules are available for the following user interface components:

Save action

To understand On Save rules, it is important to understand how the saving of records works in Resco mobile apps. This is the order of events when saving:

  1. User initiates the saving process.
  2. On Save rules are executed.
  3. The app checks whether the record can be saved (rules may interrupt save).
  4. If valid, the record is saved.


SaveAfter defines an event in which a certain action is performed after saving (the form or questionnaire). This event is typically used in the case of a referential (look-up) entity. For example, we want to save a new Lead. We have On Save rule where we create a Task to remind us to contact the Lead. If something goes wrong during save, we will have Task without Lead. SaveAfter ensures that the Lead is saved first and only then the Task, as empty references cause errors.

  • Available only for On Save and On Execute rules.
  • In questionnaires, available for root questions (and not for question groups)

Display validation problems

There are two built-in string variables that can be used to display validation problems:

  • ErrorMessage: A string variable where you can set an error message for form. In the case of On Save event, this stops the saving.
ErrorMessage Assign Website URL cannot be empty!
  • WarningMessage: A string variable where you can set an error message for form. In the case of On Save event, this does not prevent saving, user can decide to continue.
WarningMessage Assign Website URL is empty! Continue anyway?


Form is a screen in the application that contains numerous fields that either hold or await the data. The default behavior of an entity form can be changed using form rules. Form rules describe sequences of steps that are executed on form-related events. On Save usually serves as a final field validation or they can automate changes in related records.

Rule execution
  • When you save a record.

Example: Main phone field validation

This rule shows a warning message if the phone format is not correct. As this is only a warning, users can ignore it and save the record anyway.

Warrning message example.PNG

Example: Check related entity before saving

This somewhat dated blog shows how to check a related record before you can save changes. Blog

Example: Validating field with style

If the Main Phone field does not contain any data or does not match regex, assign the "Red" style to the field. Otherwise, assign "Table" as style.

Style validation of mobile phone.PNG

Example: Validation of date fields

In this example, we validate the date filed where the date is supposed to be in past.

We create a DateTime variable called Today, set to today. If the field lastonholdtime value is in the future, we set the focus on the field and display error message.


Example: Automatically schedule a task while saving a new lead

If the Lead is new, we create a new task via NewInstance. Then we use steps to fill in the necessary information for the newTask. In the end, we add a step to save the Task after the Lead (since the task can only refer to an already existing record).

Schedule a task.PNG

To see the rule execution in the app, click here.

Example: Detect record duplicity

Create a variable with the LoadFetch operator, where we look for an account with the same name but a different ID. If there is an account like this, display the warning message.

Already existing account check.PNG

Used Fetch:

Already existing account check Fetch.PNG

To see the rule execution in the app, click here.


On Save rules can be used with views, but only when the Editable field is set. (Editable field, list, or editable grid is a feature that allows users to edit one or more records directly from the view, without a need to go to the form of a record.)

Example: Email field validation

Set the email field as edit or directedit type. If the email field does not match regex, an error message will pop up.



In inspections, there are two options for when to execute On Save rules.

Rule execution
  • When you complete the questionnaire.
  • When you save or complete the questionnaire.

This behavior is configured on the questionnaire level, in the Validate On property.

Example: Create a new task based on next inspection

If the next inspection date question is filled in, a new task with data loaded from the questionnaire is created.

OnSave newTask.PNG

Example: Measure the duration of inspection

This rule measures the time duration of an inspection. Since the rule has to contain the start and end of the inspection, we need to include both On Load and On Save.

On Load part

We create a shared variable StartInspection, where we assign the current time (by SetNow). We then assign this value to the start-of-inspection question.

Inspection start time.PNG

On Save part

We create a shared variable EndInspection, where we assign the current time (by SetNow). We then assign this value to the end-of-inspection question. We then create a variable var2 where we calculate the time difference between StartInspection and EndInspection (the result is set to be in minutes). In the end, we assign var2 to question inspection.time.

Inspection end time.PNG

Note Questions start-of-inspection and end-of-inspection are optional. They are not required for the rule to work.

Example: Check all instances of a repeatable group

In the following example, we're using the questionnaire variable QuestionGroups to access group data. Notably, it uses QuestionGroups.{group name}.All to access all instances of a repeatable group. In the questionnaire "Assets Inspection", one repeatable group is used for each asset. Within each instance of this group, the yes/no question "issue-encountered" holds information on whether the asset is okay. This way, we can use a simple On Save rule to check the status of all instances of the repeatable group and set a suitable questionnaire result.

Questiongroup example.png

Example: Create new workorder if next inspection is necessary

This example is an On Save addition to the On Load rule: Populate the questions with data from regarding lookup entity 2. If the next inspection is necessary and recommended date of the next inspection is filled in, a new workorder is created.

RegardingObjectLookup OnSave.PNG

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