From be77e85f432940ab4f0d65cceb67b59595ff9f96 Mon Sep 17 00:00:00 2001
From: Silvano Cerza <3314350+silvanocerza@users.noreply.github.com>
Date: Mon, 8 Apr 2024 16:44:45 +0200
Subject: [PATCH] Fix inaccuracy in PromptBuilder docstring (#7503)

---
 haystack/components/builders/prompt_builder.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/haystack/components/builders/prompt_builder.py b/haystack/components/builders/prompt_builder.py
index f78610b06..64b85d76a 100644
--- a/haystack/components/builders/prompt_builder.py
+++ b/haystack/components/builders/prompt_builder.py
@@ -9,7 +9,9 @@ from haystack import component, default_to_dict
 class PromptBuilder:
     """
     PromptBuilder is a component that renders a prompt from a template string using Jinja2 templates.
-    The template variables found in the template string are used as input types for the component and are all required.
+
+    The template variables found in the template string are used as input types for the component and are all optional.
+    If a template variable is not provided as an input, it will be replaced with an empty string in the rendered prompt.
 
     Usage example:
     ```python