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
1. **Variables**:
- Syntax: `{{ variable_name }}`
- Example: `Hello, {{ user_name }}!`
2. **Control Structures**:
- **For Loop**:
```jinja
{% for item in item_list %}
- {{ item }}
{% endfor %}
```
- **If Statement**:
```jinja
{% if user.is_active %}
Welcome back, {{ user.name }}!
{% else %}
Please activate your account.
{% endif %}
```
3. **Filters**:
- Syntax: `{{ variable_name | filter_name }}`
- Example: `{{ user_name | upper }}`
- Common Filters: `upper`, `lower`, `title`, `default`
4. **Macros**:
- Syntax:
```jinja
{% 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.
Example Review Template
Below are some examples of templates:
Please look at the bill and ensure that the total billed amount is {{ total_bill_amount }}