Tax queries and meta queries in Wordpress - Mini Project: Build & Apply

Tax Queries and Meta Queries in WordPress

📖 Scenario: You are building a WordPress site that lists books. You want to show only books that belong to a specific genre and have a custom field rating above a certain value.

🎯 Goal: Build a WordPress query that fetches posts of type book filtered by a taxonomy term genre and a meta field rating greater than 4.

📋 What You'll Learn

Create a taxonomy query filtering by the genre term 'fiction'

Create a meta query filtering books with rating greater than 4

Combine taxonomy and meta queries in a single WP_Query

Use correct array keys and structure for tax_query and meta_query

💡 Why This Matters

🌍 Real World

Filtering posts by categories and custom fields is common in WordPress sites like online stores, blogs, and portfolios.

💼 Career

Understanding tax queries and meta queries is essential for WordPress developers building custom themes and plugins that require advanced content filtering.

1

Create the base WP_Query arguments

Create an array called $args with a key post_type set to 'book'.

Wordpress

# Create the base query arguments array
# Your code here

Need a hint?

Start by specifying the post type you want to query.

2

Add a taxonomy query for genre 'fiction'

Add a tax_query key to $args with an array filtering the taxonomy 'genre' for the term 'fiction'. Use 'field' => 'slug' and 'terms' => 'fiction'.

Wordpress

$args = [
    'post_type' => 'book',
    // Add tax_query here
    # Your code here
];

Need a hint?

Use a nested array for tax_query with the correct keys.

3

Add a meta query for rating greater than 4

Add a meta_query key to $args with an array filtering the meta key 'rating' for values greater than 4. Use 'compare' => '>' and 'type' => 'NUMERIC'.

Wordpress

$args = [
    'post_type' => 'book',
    'tax_query' => [
        [
            'taxonomy' => 'genre',
            'field' => 'slug',
            'terms' => 'fiction'
        ]
    ],
    // Add meta_query here
    # Your code here
];

Need a hint?

Use a nested array for meta_query with the correct keys and numeric comparison.

4

Create the WP_Query with combined tax and meta queries

Create a variable $query and assign it a new WP_Query object using the $args array.

Wordpress

$args = [
    'post_type' => 'book',
    'tax_query' => [
        [
            'taxonomy' => 'genre',
            'field' => 'slug',
            'terms' => 'fiction'
        ]
    ],
    'meta_query' => [
        [
            'key' => 'rating',
            'value' => 4,
            'compare' => '>',
            'type' => 'NUMERIC'
        ]
    ]
];

// Create the WP_Query object
# Your code here

Need a hint?

Use the WP_Query class with the arguments array to get the filtered posts.