Understanding Jinja Templating for Dynamic User Reviews
Jinja templating is a powerful tool that allows you to create dynamic and customizable text outputs, ideal for creating personalized user reviews based on data extracted from documents. Here's a guide to help you understand the basics of Jinja templating in this context.
What is Jinja?
Jinja is a templating engine for Python that enables you to generate dynamic content by embedding Python-like expressions within static text. It is commonly used in web development but is equally powerful in other applications requiring dynamic content generation.
Key Features of Jinja
Variables: Embed dynamic data within your template.
Control Structures: Use loops and conditionals to control the flow of your template.
Filters: Modify the output of your variables with built-in or custom filters.
Macros: Define reusable blocks of code for complex templates.
Basic Syntax
Variables:
Syntax:
{{ variable_name }}Example:
Hello, {{ user_name }}!
Control Structures:
For Loop:
{% for item in item_list %} - {{ item }} {% endfor %}If Statement:
{% if user.is_active %} Welcome back, {{ user.name }}! {% else %} Please activate your account. {% endif %}
Filters:
Syntax:
{{ variable_name | filter_name }}Example:
{{ user_name | upper }}Common Filters:
upper,lower,title,default
Macros:
Syntax:
{% macro render_user(user) %} <p>{{ user.name }} - {{ user.email }}</p> {% endmacro %} {{ render_user(user) }}
Applying Jinja to User Reviews
Imagine you have a document from which you extract data elements like document_title, author_name, and publish_date. Using Jinja, you can create a dynamic review prompt that incorporates these elements.
Available Variables
We make the following variables available to use in the review template:
content : this is the text of the whole document
family : this is the document family we are working on
data : data that has already been extracted, as a list of objects
externalData : the external data associated with the document family
metadata : the metadata associated with this document family
Example Review Template
Below are some examples of templates:
Please look at the bill and ensure that the total billed amount is {{ externalData.total_bill_amount }}