ChatPromptTemplate.fromPromptMessages constructor

ChatPromptTemplate.fromPromptMessages(List<ChatMessagePromptTemplate> promptMessages, { bool validateTemplate = true, })

Creates a ChatPromptTemplate with a list of template messages.

• promptMessages the list of template messages. The list can contain:
  • SystemChatMessagePromptTemplate (for system messages)
  • HumanChatMessagePromptTemplate (for human messages)
  • AIChatMessagePromptTemplate (for AI messages)
  • CustomChatMessagePromptTemplate (for custom role messages)
• validateTemplate whether to validate the template.

Implementation

factory ChatPromptTemplate.fromPromptMessages(
  final List<ChatMessagePromptTemplate> promptMessages, {
  final bool validateTemplate = true,
}) {
  final inputVariables = promptMessages
      .map((final m) => m.inputVariables)
      .expand((final i) => i)
      .toSet();
  final partialVariables = {
    for (final m in promptMessages) ...?m.partialVariables,
  };
  final t = ChatPromptTemplate(
    inputVariables: inputVariables,
    partialVariables: partialVariables.isEmpty ? null : partialVariables,
    promptMessages: promptMessages,
  );
  if (validateTemplate) {
    t.validateTemplate();
  }
  return t;
}