### Using $fromAI() for Number Type - n8n Expressions

Source: https://github.com/nithichotec/n8n/blob/main/app_langchain_73.md

Provides an example of using the $fromAI() function to dynamically populate a field expected to be a number, specifying the 'number' type and a default value.

```javascript
$fromAI("numItemsInStock", "Number of items in stock", "number", 5)
```

--------------------------------

### Using $fromAI() with All Parameters - n8n Expressions

Source: https://github.com/nithichotec/n8n/blob/main/app_langchain_73.md

Shows how to use the $fromAI() function with all available parameters: key, description, type, and defaultValue. This provides more context and guidance to the AI model for populating the value.

```javascript
$fromAI("name", "The commenter's name", "string", "Jane Doe")
```

--------------------------------

### Basic Usage of $fromAI() with Key - n8n Expressions

Source: https://github.com/nithichotec/n8n/blob/main/app_langchain_73.md

Demonstrates the simplest way to use the $fromAI() function by providing only the required 'key' parameter. The AI model uses this key as a hint to find or generate the relevant data.

```javascript
{{ $fromAI('email') }}
```

--------------------------------

### Using $fromAI() with Only Key Parameter - n8n Expressions

Source: https://github.com/nithichotec/n8n/blob/main/app_langchain_73.md

Illustrates the simplified usage of the $fromAI() function when only the required 'key' parameter is needed, omitting the optional parameters.

```javascript
$fromAI("name")
```

--------------------------------

### Reverting n8n Database Migrations - CLI

Source: https://github.com/nithichotec/n8n/blob/main/app_langchain_26.md

This command is used in self-hosted n8n instances to revert database migrations. It is a necessary step when rolling back to a previous n8n version after an update, ensuring the database schema is compatible with the older version.

```Shell
n8n db:revert
```

--------------------------------

### Embedding $fromAI() in a String - n8n Expressions

Source: https://github.com/nithichotec/n8n/blob/main/app_langchain_73.md

Shows how to use the $fromAI() function within a larger string expression to populate only a part of a field dynamically using the AI model.

```javascript
Generated by AI: {{ $fromAI("subject") }}
```

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