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LoginSpring form submit validation for foreign key
General Tech Technology & Software 2 years ago
Posted on 16 Aug 2022, this text provides information on Technology & Software related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
manpreet 2 years ago
Here you have to implement validator for Technology object
class TechnologyValidator extends Validator {
public boolean supports(Class cls) {
return Technology .class.equals(cls);
}
public void validate(Object target, Errors errors) {
super.validate(target, errors);
Technology tecObj= (Technology ) target;
//here i am assuming Technology name is REQUIRED and
//NotEmpty.technology.name is in message.properties
ValidationUtils.rejectIfEmptyOrWhitespace(errors,"name",
"NotEmpty.technology.name");
Department dept = tecObj.getDepartment();
//as from from your are binding department ID
if (dept==null || dept.getId()==null || dept.getId()==0L ) {
errors.rejectValue("department.id", "NotEmpty.technology.department");
}
}
}And create bean of this class in Spring-context
@Autowired
TechnologyValidator techValid;And call this validator in your controller like
@RequestMapping(value = "/add-technology")
public String addTechnology(
@ModelAttribute(value = "technology") Technology technology,
BindingResult result) {
//call validator
techValid.validate(technology, result);
if(result.hasErrors()){
return "/secure/admin/technology";
}
java.util.Date utilDate = new java.util.Date();
Date sqlDate = new Date(utilDate.getTime());
technology.setCreatedDate(sqlDate);
technologyService.saveTechnology(technology);
return "redirect:/technologies";
}manpreet 2 years ago
Here you have to implement validator for Technology object
class TechnologyValidator extends Validator {
public boolean supports(Class cls) {
return Technology .class.equals(cls);
}
public void validate(Object target, Errors errors) {
super.validate(target, errors);
Technology tecObj= (Technology ) target;
//here i am assuming Technology name is REQUIRED and
//NotEmpty.technology.name is in message.properties
ValidationUtils.rejectIfEmptyOrWhitespace(errors,"name",
"NotEmpty.technology.name");
Department dept = tecObj.getDepartment();
//as from from your are binding department ID
if (dept==null || dept.getId()==null || dept.getId()==0L ) {
errors.rejectValue("department.id", "NotEmpty.technology.department");
}
}
}And create bean of this class in Spring-context
@Autowired
TechnologyValidator techValid;And call this validator in your controller like
@RequestMapping(value = "/add-technology")
public String addTechnology(
@ModelAttribute(value = "technology") Technology technology,
BindingResult result) {
//call validator
techValid.validate(technology, result);
if(result.hasErrors()){
return "/secure/admin/technology";
}
java.util.Date utilDate = new java.util.Date();
Date sqlDate = new Date(utilDate.getTime());
technology.setCreatedDate(sqlDate);
technologyService.saveTechnology(technology);
return "redirect:/technologies";
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manpreet![Tuteehub forum best answer]()
Best Answer
2 years ago
My project is a spring mvc project.In my project i have a domain Technology which has foreign key reference.When i validating on form submit it threw error....For view part(jsp),i using form:select for viewing department in technology. How can i validate a foreign reference????? i tried below code
domain
message.properties
Technology.jsp
controller
ERROR