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WordPress Framework as a Web Application – Building a Simple Recipes Database

In the past, WordPress has evolved from a powerful blog system to a powerful CMS, and recently it has evolved into a powerful web application framework. In fact, with WordPress customizations and WordPress APIs, I can imagine that not many applications, you can't build. However, there are many applications that should not use WordPress builds. Choosing which framework to use (or choosing not to use a framework) is a balance between many advantages and disadvantages that affect architecture, performance, security, and scalability.

I have found WordPress to be very useful for medium-sized web applications without too much traffic. Building a small application from scratch, such as a restaurant table reservation system, or even a framework such as Rails or CakePHP, involves thinking about database schemas, controller structures, authentication, user interfaces, and so on. WordPress is already doing a lot of these things: You already have rough user management, an available management interface, and you only need to think about how to map the data model to an existing WordPress database structure.

Our Use Case: Recipe Database

Now, I would like to show you how to use WordPress to implement a simple recipe database. The requirements are very basic:

  1. allows recipes to be added and edited like regular posts or pages
  2. allows to classify recipes as healthy -> chicken -> marinated chicken breast
  3. allows to add ingredients to In recipes, ingredients recipes
  4. allow to add quantities in the recipe, for example 500ml milk, 20g sugar, 3 tablespoons olive oil

I will focus on how to customize WordPress to your data The model is adapted to show you how to use the basic elements to build each web application that supports WordPress:

  • Custom Article Type
  • Custom Category
  • Custom Field

[19659002] 19659002] In WordPress, the foundation of each content holding entity is an article. The two types of posts that you are familiar with are posts and pages. For our recipe database, we will create a new type: recipes.


register_post_type(' recdb_recipe';
Array(
) - array of tags (
' name 
),
"public ="=> true,
"has_archive"=>true,
"Support' has_archive' 39; => arrays ("title", "editor", "#39; custom-fields ])
)
);

New post types will be displayed in posts and pages in the admin interface. It provides a field for the recipe title and provides a recipe description section An edit field. We even added support for custom fields, which will be needed later.

Set custom taxonomies for recipe categories and ingredients

In WordPress, taxonomies do not apply to save content, As posts, they are used to organize it.You should be accustomed to two default taxonomies: classification (layered) and labeling (without hierarchy). However, like postal types, you can add your own classifications for our recipes. number Libraries, you can use categories and tags, but they are really used to publish posts, so we create our own recipe categories and link them to recipe post types:


register_taxonomy (
' recdb_categories';
array(' recdb_recipe#),
array(
" label> =>Recipe category'
' sort' => true,
"rewrite" => array (' => ' recipe class' '
' hierarchical structure ' => true,
' show_in_nav_menus' => true
)
);

In the admin interface, they will be displayed under the recipe menu and will be included in each recipe later A list of check boxes is displayed to classify them. They are the same as the ingredients we want, but they are slightly different: they do not have to be layered because each recipe has only a simple list of ingredients. Here's how to create a raw material taxonomy that will work like a normal tag. You can manage it from the admin interface and add it to any recipe:


register_taxonomy(
' recdb_categories';
Array(' recdb_recipe'),
array([19459010)'label'=>'Recipecategories'
'sort'=> true,
"rewrite"#39 ; => array ('slug'=>'recipe-categories'),
"hierarchical"=> true,
"show_in_nav_menus" #39; => true
)
);

Setting Custom Fields for Deep-rooted Units

Now we can create new recipes, classify them and add ingredients. The last missing function is to add some amount of raw material because if you don't know how much food there is, then the information you need for milk when cooking your dinner is useless. Here is the custom field to enter the picture. For all ingredient labels to be added to the recipe, you must also add custom fields. The name of the field is always Quantity which will allow us to read them as arrays later. The value must be formatted as follows: taxonomy-term-slug:string . Here are some specific examples of custom fields on our recipes:

  1. Quantity -> Water: 100 ml
  2. Quantity -> Milk: 200 ml
  3. Quantity -> Sugar: 20 g

In your topic

I assume you have a work theme and now want to add a special template for the recipe. First add recipe categories to the menu. You are using custom menus that will be displayed in the menu editor just like the normal categories (you may have to activate them in the screen options panel). You should now be able to navigate to the recipe categories added on your site. The recipes included will appear with your index.php or other matching template.

The next step is to create a custom loop for recipes. We usually build a fairly regular loop, including the the_title and the_content template tags. However, building a list of ingredients is a bit special. To do this, we must first use get_post_meta to get the number of yuan values. Then, we cycle through the quantity, read the quantity and composition, and finally we provide a component link, which causes the site to list recipes with the same ingredients. Create a file named loop-recipes.php in your template directory and add the following loop:




>

    <? Php
    if(is_single()):
    $ quantities = get_post_meta(get_the_ID(),"number");
    foreach($ quantity as $ quantity):
    $ quantity = explode(&# 39;:&#39;; $ quantity);? >

  • <a href =&#39; &#39;>


    <? Php
    endforeach;
    endif;
    ? >

    <? Php
    if(is_single()):
    the_content();
    else:
    the_excerpt();
    ? > <a href=" ">Reading recipes <? Php
    endif;? >


Now there are only loops embedded in the template files for recdb_categories and recdb_ingredients and adding templates to show the complete recipe. Create three files named taxonomy-recdb_categories.php, taxonomy-recdb_ingredients.php, and single-recdb_recipe.php in the templates directory. The following code enters the classification template:



Category:

List of recipes in the category


Code for the ingredients template here :




Formula list using




[1965902] Conclusions

If you followed all the steps, you should have a very basic but working recipe database running. Of course, from the user's point of view, adding ingredients is really scary, but this tutorial has nothing to do with usability. This is a starting point for anyone who wants to use WordPress as the basis for a web application that is not a blog or a regular website. I think it's important to really understand WordPress customizations and learn to map them to your own use cases.

Of course, there are some disadvantages to using WordPress for your web app, you shouldn't ignore them. However, once you decide to use WordPress, you will get a lot of cool features to defeat the disadvantages.

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