Month: July 2018

Show data from two JPA entity tables on same page using Spring Boot and Thymeleaf

ziankabir 5 Comments
spring boot thymeleaf bootstrap 4

Let’s say you want to display multiple table contents in Spring Boot project using Thymeleaf, JPA Entity and Model.

In my project I have mapped a relationship between the two entities I need to retrieve data from and am wondering how to display data from the two tables on list page. I’ve ‘category’ table and ‘product’ table like below:

Spring Boot, Thymeleaf Show data from two JPA entity tables on same page using Spring Boot and Thymeleaf

And in my controller I’ve list of both category and product in respective model. Here is the snippet:

model.addAttribute("products", productService.findAll());
model.addAttribute("categories", categoryService.findAll());

So, I’ve all the required data in the model and I can access them from Thymeleaf. Let’s copy the table code from below (N.B: I’ve used bootstrap table):

<table class="table table-striped table-bordered table-responsive" role="grid">
   <thead>
      <th>Category</th>
      <th>Product</th>
   </thead>
   <tbody>
      <tr role="row" class="odd" th:each="product:${products}">
         <td>
            <p th:each="category : ${categories}" th:if="(${category.id} == ${product.id})" th:text="${category.name}"></p>
         </td>
         <td th:text="${product.name}">
      </tr>
   </tbody>
</table>

It’ll produce something like this:

Spring Boot, Thymeleaf: Display data from two JPA entity tables on same page

That’s all! We’re done!
If you’ve any confusion please let me know 🙂

Thymeleaf select required not working?

ziankabir Leave a comment
thymeleaf

Since last few days trying to add select “required” attribute in my Thymeleaf project.  Neither of these works in Thymeleaf:

  • <select required=”required”>
  • <select required=’required’>
  • <select required=required>
  • <select required=””>
  • <select required=”>
  • <select required>

In this tutorial I’m gonna show how to achieve this.

Let’s copy the code from below:

<select th:name="someName" class="form-control" id="someID" th:required="true">
    <option value="">Select Category</option>
    <option th:each="model: ${someModel}" th:value="${model.id}"
            th:text="${model.Title}"></option>
</select>

Please note that, first/default option value must be set to “” if you put “0” it won’t work!

That’s all! We’re done!
If you’ve any confusion please let me know 🙂