Handling Form Submission :: Learn how to create and submit a web form with Spring.
Home Page: https://spring.io/guides/gs/handling-form-submission/
License: Apache License 2.0
Allowing the user to enter a number will result in a status 400 because it failed to validate object greeting with a string id. # # #
I am try to using Angularjs2 with spring boot application every thing working fine with the small issue.
Description:
step1. if we have default router like router('') meaning localhost:8080/ it is calling index.html page with out having issues.
step2. if we have added context path like router('accountsummary') meaning localhost:8080/accountsummary its not working. when i give like below configuration in spring boot conf like below:
@configuration
public class WebController extends WebMvcConfigurerAdapter{
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/accountSummary").setViewName("index.html");
}
}
it was working fine.
@configuration
public class WebController extends WebMvcConfigurerAdapter{
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/accountSummary/**").setViewName("index.html");
}
}
its not working and giving like below:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu Jun 30 15:11:38 EDT 2016
There was an unexpected error (type=Not Found, status=404).
No message available
Can any one pleae help me out
in the text. But was not able to make a pull request.
2 asteriks are not properly escaped in the text.
This isn't a "bug" with this tutorial per-se, but rather a gotcha that I was trying to solve which led me to this tutorial in an effort to figure out what I was doing wrong. If this should not be recorded here, please suggest another place to put it.
Problem: Certain Thymeleaf expressions seem to cause the page to only partially load.
Solution: Add the following to the application configuration (ie: application.properties")
spring.thymeleaf.servlet.produce-partial-output-while-processing=false
In my case, my template was taking advantage of the th:replace and th:insert attributes.
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="https://www.thymeleaf.org">
<head th:replace="~{'fragments/headTagFragment'}"><title>Will Be Replaced</title></head>
<body>
<div th:replace="~{'fragments/navigation'}"></div>
<form th:action="@{/contact}" th:object="${contactMessageDTO}" method="POST">
<!-- boilerplate contact form -->
</form>
<div th:replace="~{'fragments/footer'}"></div>
</body>
</html>
Experience:
HTML tags and the HEAD tags, but the headTagFragment would only be partially rendered, and the degree of rendering was random.th:action in my form tag. This sent me down a rabbit hole looking for why the /contact endpoint could not be found.th:action the page would load (but of course, it would not have anywhere to submit to).navigation fragment, the page would load (but it would not look as designed).Setting the produce-partial-output-while-processing to false, forced the page to be fully created before rendering in the browser. That seems to have been key.
It would be nice to see an example of an advance form submission. We recently were working on a project that had a form that looked like this:
//example: for each $post in $posts
<li>
<input name="post[$postId][title]" value="$post.title" />
</li>
We really struggled with the appropriate way to structure a controller request model that Spring WebMVC would bind to. Maybe help there is a guide, and maybe also it is improvement to the documentation on html form binding.
In this project, the following code lead me to a great misunderstanding, I want to share it, and maybe I can help others.
// GreetingController.java
@PostMapping("/greeting")
public String greetingSubmit(@ModelAttribute Greeting greeting) {
return "result";
}
// result.html
<p th:text="'content: ' + ${greeting.content}"/>
At first glance in the result.html, I thought greeting object may refer to the @ModelAttribute Greeting greeting, then I tried to make some modification to use another model OtherModel, but it turned out to be exception.
After google quite a while, I found out that here the ${greeting.content} is linked to the name of the model class rather than the name of the key.
So I believe that the proper way to do this is like this.
@PostMapping("/greeting2")
public String greetingSubmit(@ModelAttribute OtherModel greeting, Model model) {
model.addAttribute("greeting", greeting);
return "result";
}
Thanks
Update the guide to use the most recent Spring Boot version.
To do so, update the Spring Boot version in:
initial/build.gradle
initial/pom.xml
complete/build.gradle
complete/pom.xml
Update the guide to use the most recent Spring Boot version.
To do so, change the Spring Boot version in:
initial/build.gradle
initial/pom.xml
complete/build.gradle
complete/pom.xml
Why is there a @ModelAttribute annotation on the parameter of Greeting type in POST request handler? This seems either redundant or unexplained.
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