scaffold_coredata_model

Generate a Core Data model (.xcdatamodeld) file with a named entity and optionally pre-defined attributes. This tool creates the data model file that Core Data uses to define your persistent object graph, saving you from manually configuring entities in the Xcode model editor.

Parameters

Parameter	Type	Required	Default	Description
name	string	Yes	—	The name of the Core Data entity (e.g., "Workout")
outputPath	string	Yes	—	Absolute path to the directory where the .xcdatamodeld package will be created
attributes	array	No	—	List of attribute objects, each with name (string) and type (enum)

Attribute Types

The type field in each attribute object accepts one of the following values:

String, Integer16, Integer32, Integer64, Double, Float, Boolean, Date, Binary, UUID, URI

Usage Examples

Create an entity with typed attributes

“Create a Core Data model for a Workout entity with name, duration, calories, and date”

{
  "name": "Workout",
  "outputPath": "/Users/dev/Projects/FitnessTracker/FitnessTracker/Models",
  "attributes": [
    { "name": "name", "type": "String" },
    { "name": "duration", "type": "Double" },
    { "name": "caloriesBurned", "type": "Integer32" },
    { "name": "completedAt", "type": "Date" },
    { "name": "id", "type": "UUID" }
  ]
}

Create a simple entity without attributes

“Scaffold a Core Data model called MealEntry that I’ll configure later”

{
  "name": "MealEntry",
  "outputPath": "/Users/dev/Projects/FitnessTracker/FitnessTracker/Models"
}

Create an entity with binary data for images

“Create a Core Data model for UserProfile that stores an avatar image”

{
  "name": "UserProfile",
  "outputPath": "/Users/dev/Projects/FitnessTracker/FitnessTracker/Models",
  "attributes": [
    { "name": "id", "type": "UUID" },
    { "name": "displayName", "type": "String" },
    { "name": "email", "type": "String" },
    { "name": "avatarData", "type": "Binary" },
    { "name": "joinedAt", "type": "Date" },
    { "name": "isPremium", "type": "Boolean" }
  ]
}

Example Output

Created Core Data model: /Users/dev/Projects/FitnessTracker/FitnessTracker/Models/Workout.xcdatamodeld

Entity: Workout
Attributes:
  name          String
  duration      Double
  caloriesBurned Integer32
  completedAt   Date
  id            UUID

Related Tools

• scaffold_viewmodel — Create a view model that fetches and manages Core Data objects
• scaffold_view — Generate a SwiftUI view to display Core Data entities
• project_create — Create a new project that can include Core Data support

Tips

Tip

Always include a UUID attribute as a stable unique identifier for each entity. This makes it easier to conform to Identifiable and use entities in SwiftUI List and ForEach views.

Tip

For large binary data such as images or files, consider enabling “Allows External Storage” on the attribute in the Xcode model editor after generating it. This lets Core Data automatically store large blobs on disk instead of in the SQLite database.

Caution

If you create multiple entities that need relationships, you will need to define those relationships in the Xcode model editor after generating each entity. This tool creates individual entities but does not set up inter-entity relationships.