> ## Documentation Index
> Fetch the complete documentation index at: https://cdktn.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Typescript: TerraformSelf
> CDKTN Core API Reference for TerraformSelf in Typescript.
Expressions in connection blocks cannot refer to their parent resource by name.
References create dependencies, and referring to a resource by name within its own block would create a dependency cycle.
Instead, expressions can use the self object, which represents the connection's parent resource and has all of that resource's attributes.
For example, use self.public\_ip to reference an aws\_instance's public\_ip attribute.
## Initializers
```typescript theme={null}
import { TerraformSelf } from 'cdktn'
new TerraformSelf()
```
| **Name** | **Type** | **Description** |
| -------- | -------- | --------------- |
***
## Static Functions
| **Name** | **Description** |
| ------------------------------------------------------------------- | ----------------------------------------------------------------------------------- |
| getAny | Only usable within a connection block to reference the connections parent resource. |
| getNumber | Only usable within a connection block to reference the connections parent resource. |
| getString | Only usable within a connection block to reference the connections parent resource. |
***
### `getAny`
```typescript theme={null}
import { TerraformSelf } from 'cdktn'
TerraformSelf.getAny(key: string)
```
Only usable within a connection block to reference the connections parent resource.
Access a property on the resource like this: `getAny("hostPort")`
#### `key`Required
* *Type:* string
***
### `getNumber`
```typescript theme={null}
import { TerraformSelf } from 'cdktn'
TerraformSelf.getNumber(key: string)
```
Only usable within a connection block to reference the connections parent resource.
Access a property on the resource like this: `getNumber("hostPort")`
#### `key`Required
* *Type:* string
***
### `getString`
```typescript theme={null}
import { TerraformSelf } from 'cdktn'
TerraformSelf.getString(key: string)
```
Only usable within a connection block to reference the connections parent resource.
Access a property on the resource like this: `getString("publicIp")`
#### `key`Required
* *Type:* string
***