How to make an int array/list property?

Question

Maybe the question is dumb, but (appart of IntVectorProperty) I didn't found anything in the API, so I was wondering about the best way to make a simple list/array.

I tried:

my_list_of_ints:CollectionProperty(type=IntProperty)

But says it cannot be registered.

IntVectorProperty is not useful in my case since I need the list to be dynamic (API says that the vector must be of a predefined size).

So I was wondering about the best approach of making that list of ints.

Edit: the context is to have that array/list of ints inside a class that inherits PropertyGroup.

class ObjectA(PropertyGroup):
    int_list:list[int] # This gives error (says property dont exist when I access it)
    int_list:list[int] = [] # This dont give an error, but the data is not saved
    int_list:IntVectorProperty() # I cant use that since the vector is not dynamic

Thank you so much for the help.

Answer 1

CollectionProperty is what you need. First define your integer property class like so:

class MyIntProp(bpy.types.PropertyGroup):
    name: bpy.props.StringProperty(default="")
    value: bpy.props.IntProperty(default=0)

and register it:

bpy.utils.register_class(MyIntProp)

then define you collection:

my_array: CollectionProperty(type=MyIntProp)

now you can add elements to it:

first = self.my_array.add()
first.name = "first"
first.value = 1