Int32 Type

Tip

Use Float32 Type for 32-bit floating point numbers. Use Number Attribute for arbitrary precision numbers.

Int32 types store a 32-bit integer number.

By default, int32 from schema (configuration, plan, and state) data are represented in the framework by types.Int32Type and its associated value storage type of types.Int32. These types fully support Terraform's type system concepts that cannot be represented in Go built-in types, such as *int32. Framework types can be extended by provider code or shared libraries to provide specific use case functionality.

Schema Definitions

Use one of the following attribute types to directly add a int32 value to a schema or nested attribute type:

Schema Type	Attribute Type
Data Source	`schema.Int32Attribute`
Provider	`schema.Int32Attribute`
Resource	`schema.Int32Attribute`
Ephemeral Resource	`schema.Int32Attribute`

If the int32 value should be the element type of a collection attribute type, set the ElemType field to types.Int32Type or the appropriate custom type.

If the int32 value should be a value type of an object attribute type, set the AttrTypes map value to types.Int32Type or the appropriate custom type.

Accessing Values

Tip

Review the attribute documentation to understand how schema-based data gets mapped into accessible values, such as a types.Int32 in this case.

Access types.Int32 information via the following methods:

(types.Int32).IsNull() bool: Returns true if the int32 is null.
(types.Int32).IsUnknown() bool: Returns true if the int32 is unknown.
(types.Int32).ValueInt32() int32: Returns the known int32, or 0 if null or unknown.
(types.Int32).ValueInt32Pointer() *int32: Returns a int32 pointer to a known value, nil if null, or a pointer to 0 if unknown.

In this example, a int32 value is checked for being null or unknown value first, before accessing its known value:

// Example data model definition
// type ExampleModel struct {
//   ExampleAttribute types.Int32 `tfsdk:"example_attribute"`
// }
//
// This would be filled in, such as calling: req.Plan.Get(ctx, &data)
var data ExampleModel

// optional logic for handling null value
if data.ExampleAttribute.IsNull() {
    // ...
}

// optional logic for handling unknown value
if data.ExampleAttribute.IsUnknown() {
    // ...
}

// myInt32 now contains a Go int32 with the known value
myInt32 := data.ExampleAttribute.ValueInt32()

Setting Values

Call one of the following to create a types.Int32 value:

types.Int32Null(): A null int32 value.
types.Int32Unknown(): An unknown int32 value.
types.Int32Value(int32): A known value.
types.Int32PointerValue(*int32): A known value.

In this example, a known int32 value is created:

types.Int32Value(123)

Otherwise, for certain framework functionality that does not require types implementations directly, such as:

Numbers can be automatically converted from the following Go types, pointers to these types, or any aliases of these types, such type MyNumber int:

int, int8, int16, int32, int64
uint, uint8, uint16, uint32, uint64
float32, float64
*big.Int, *big.Float

An error will be returned if the value of the number cannot be stored in the numeric type supplied because of an overflow or other loss of precision.

In this example, a int32 is directly used to set a int32 attribute value:

diags := resp.State.SetAttribute(ctx, path.Root("example_attribute"), 123)

In this example, a types.List of types.Int32 is created from a []int32:

listValue, diags := types.ListValueFrom(ctx, types.Int32Type, []int32{123, 456})

Extending

The framework supports extending its base type implementations with custom types. These can adjust expected provider code usage depending on their implementation.