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Overview

Serverless Onchange is a developer utility module for Odoo 18 that allows you to define onchange behavior directly on the client-side without triggering a server call. This is especially useful for simple field value calculations or dynamic UI updates, reducing unnecessary API requests and resulting in a much smoother user experience. It works with multiple field types and supports formula-based dependencies between fields.

Key Features

• Client-side onchange computations without server round-trips.
• Supports multiple field types: Char, Float, Integer, HTML, Selection, Boolean.
• Formula-based field dependencies for flexible customization.
• Improves performance by reducing API calls and network load.
• Seamless integration with existing Odoo models and forms.
• Ideal for lightweight, real-time computations in the UI.

How to Use

• Define a field with the serverless_onchange parameter in your model.
• Specify a dictionary where the key is the target field and the value is a JavaScript expression.
• The expression has access to:
  • self -> current field value
  • new_values -> current unsaved field values
  • old_values -> previously saved field values
• When the source field changes, the expression is executed client-side and the target field is updated instantly.
• No server calls are made, ensuring faster response times and better UX.
• Example:

  
  boolean_field = fields.Boolean(serverless_onchange={
      'selection_field': """
  if (self){
      return 'option2';
  } else {
      return 'option3';
  }
  """
  })
              

Found any issue? Raise here -> https://github.com/RajeelZahid/OdooModules/issues/new