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userexit

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•Created by userexit on 2/24/2025 in #java-help

Best Practice for storing images spring boot

What is the best practice to store file paths in the database and the files in disk or storage service ?

6 replies

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•Created by userexit on 2/18/2025 in #java-help

SpringBoot Is it possible to add a Object with it's attributes into another Object using forms ?

To understand better the question imagine ur trying to add a product, u choose it's category and name and description, now u want to add it's productVariants too, is it possible to do this within the same form or should just I use a different one

4 replies

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•Created by userexit on 2/16/2025 in #java-help

Help understand this spring boot code (make it better too)

@Controller
public class CategoriesController {
    @Autowired
    private CategoryService categoryService;

    @GetMapping(value = "/admin/categories")
    public String editCategories(Model model) {
        model.addAttribute("category", new Category());
        return "editors/categories";
    }

    @PostMapping(value = "/admin/categories")
    public String addCategory(@Valid @ModelAttribute(name = "category") Category category, Errors errors, Model model, RedirectAttributes redirectAttributes) {
        if (errors.hasErrors()) {
            model.addAttribute("category", category);
            return "editors/categories";
        }
        categoryService.save(category);
        redirectAttributes.addFlashAttribute("successMessage", "Added category successfully");
        return "redirect:/admin/categories";
    }

    @ModelAttribute
    public void addCommonAttributes(Model model, HttpServletRequest request) {
        model.addAttribute("categories", categoryService.getAllCategories());
        model.addAttribute("category", new Category());
        model.addAttribute("requestURI", request.getRequestURI());
    }
}

@Controller
public class CategoriesController {
    @Autowired
    private CategoryService categoryService;

    @GetMapping(value = "/admin/categories")
    public String editCategories(Model model) {
        model.addAttribute("category", new Category());
        return "editors/categories";
    }

    @PostMapping(value = "/admin/categories")
    public String addCategory(@Valid @ModelAttribute(name = "category") Category category, Errors errors, Model model, RedirectAttributes redirectAttributes) {
        if (errors.hasErrors()) {
            model.addAttribute("category", category);
            return "editors/categories";
        }
        categoryService.save(category);
        redirectAttributes.addFlashAttribute("successMessage", "Added category successfully");
        return "redirect:/admin/categories";
    }

    @ModelAttribute
    public void addCommonAttributes(Model model, HttpServletRequest request) {
        model.addAttribute("categories", categoryService.getAllCategories());
        model.addAttribute("category", new Category());
        model.addAttribute("requestURI", request.getRequestURI());
    }
}

8 replies

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•Created by userexit on 2/16/2025 in #java-help

Help designin products model spring boot

I'm not really sure how to do it the right way I have products that have different sizes and colors and designs applied to them

74 replies

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•Created by userexit on 2/14/2025 in #java-help

Help with Spring not adding to the database the entity

    @PostMapping(value = "/admin/brands")
    public String addColor(@Valid @ModelAttribute(name = "brand") Brand brand, Errors errors, Model model, RedirectAttributes redirectAttributes) {
        if (errors.hasErrors()) {
            model.addAttribute(brand);
            return "editors/brand";
        }
        System.out.println(brand.getName());
        System.out.println(brand.getCharacters());
        brandService.saveBrand(brand);
        redirectAttributes.addFlashAttribute("successMessage", "Brand added successfully !");
        return "redirect:/admin/brands";
    }

    @PostMapping(value = "/admin/brands")
    public String addColor(@Valid @ModelAttribute(name = "brand") Brand brand, Errors errors, Model model, RedirectAttributes redirectAttributes) {
        if (errors.hasErrors()) {
            model.addAttribute(brand);
            return "editors/brand";
        }
        System.out.println(brand.getName());
        System.out.println(brand.getCharacters());
        brandService.saveBrand(brand);
        redirectAttributes.addFlashAttribute("successMessage", "Brand added successfully !");
        return "redirect:/admin/brands";
    }

so in here when i system outprint everything is fine, the issue is that it doesnt save it in the database ? im losing my mind i dont know what the fix is, the saveBrand simply is:

    public void saveBrand(Brand brand) {
        brandDB.save(brand);
    }

    public void saveBrand(Brand brand) {
        brandDB.save(brand);
    }

and brandDB is :

package web5.spring.hello.Repository;

import org.springframework.data.jpa.repository.JpaRepository;

import web5.spring.hello.Model.Brand;


public interface BrandDB extends JpaRepository<Brand, String> {
    
}

package web5.spring.hello.Repository;

import org.springframework.data.jpa.repository.JpaRepository;

import web5.spring.hello.Model.Brand;


public interface BrandDB extends JpaRepository<Brand, String> {
    
}

33 replies

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•Created by userexit on 12/23/2024 in #java-help

Use Case Diagram Question:

1. A customer uses a drink in the following way: he puts a coin in the drink collector parts, he selects the drink, he collects the chosen drink from the drinks tray and excess change in the change trap. Who is the actor in the system? Is it the drink, the coin collector, the customer, the drinks bin or the coin trap? 2. Marcel, whose job is to supply vending machines, can help himself to drinks. For model this activity of Marcel, should we define a new actor? How do you model that? 3. When Marcel comes with his clarque filled with new drinks to fill the drinks distributor, is it considered a new player? How do you model this? 4. Some suppliers are also qualified to carry out maintenance operations in addition to the usual operations of suppliers. They are therefore restorative in addition to be a supplier. How to model this?

12 replies

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•Created by userexit on 12/18/2024 in #java-help

Help with interfaces/ inheritance

Hello im building a game where I'll have a board and GamePiece's that will be placed on the board, I have tokens, these can be placed on the board after some validation and they can't be moved once placed for the rest of the game I have totems, these will be automatically be placed in the center at the start of the game and they can be moved afterwards I need a way to distinguish between them so: 1- Inheritance ? Bad choice of using inheritance in here because I'm not needing hierarchical use of methods in gamepiece it would only be to extends from GamePiece and call the super constructor in the constructor for both cases, so im only using it for subtyping, which is bad practice I don't know what other option there might be for this, any help designing this ?

11 replies

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•Created by userexit on 12/13/2024 in #java-help

Im trying to make dragging on a grid, but the element is dragging under the other columns and rows

4 replies

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•Created by userexit on 11/3/2024 in #java-help

How to include a thymeleaf template into another one, to include header, footer etc

Title is self explanatory -

63 replies

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•Created by userexit on 11/2/2024 in #java-help

I set incrment to be 10, and I set initial value to be 100 but its not working, did it with hibernat

242 replies

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•Created by userexit on 10/30/2024 in #java-help

How to create custom id generator for primary key in springboot

very clear question in title

302 replies

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•Created by userexit on 10/30/2024 in #java-help

How to choose between using @Enumerated and a converter ? or @PostLoad and @PrePersist ?

Which one is better ? or does it depend, and if it depends, in what does it depend ?

4 replies

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•Created by userexit on 10/28/2024 in #java-help

Enable live reload with Spring Boot devtools

help with the title

7 replies

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•Created by userexit on 10/28/2024 in #java-help

Need help with this error in vscodium

8 replies

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•Created by userexit on 10/28/2024 in #java-help

Syntax questions

Id like to know what these syntaxes mean: javadoc -d doc Hello.java jar -cf hello.jar Hello.class java -cp hello.jar Hello

36 replies

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•Created by userexit on 5/24/2024 in #java-help

Is this good composition class ?

public class ThreadComposition implements Runnable {
    private String name;
    private final Thread thread;

    public ThreadComposition(String name) {
        this.name = name;
        thread = new Thread(this);
    }

    @Override
    public void run() {
        for (int i=0; i<10; i++) {
            for (int j=0; j<50000; j++) {
                System.out.println("Thread " + name + " running");
            }
        }
    }

    public void start() {
        thread.start();
    }
}

public class ThreadComposition implements Runnable {
    private String name;
    private final Thread thread;

    public ThreadComposition(String name) {
        this.name = name;
        thread = new Thread(this);
    }

    @Override
    public void run() {
        for (int i=0; i<10; i++) {
            for (int j=0; j<50000; j++) {
                System.out.println("Thread " + name + " running");
            }
        }
    }

    public void start() {
        thread.start();
    }
}

4 replies

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•Created by userexit on 5/21/2024 in #java-help

Help decoupling a presenter class in multiple classes

4 replies

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•Created by userexit on 5/21/2024 in #java-help

Is it good practice to have 2 DTO's. one for database, one for application.

Im having an error as my DTO constructor can throw exceptions if the data introduced to it is invalid, but doing so means I can't create DTO's in DAO without handling these exceptions, but the DAO layer is not supposed to handle exceptions

4 replies

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•Created by userexit on 5/21/2024 in #java-help

Should I decouple my presenter in multiple ones ?

6 replies

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•Created by userexit on 5/20/2024 in #java-help

Help improving this code

ok so when i query a favorite row i know its id because its already been inserted, problem arises when i try inserting a favoritedto that i made in the program, i cant know what the id will be for it, but i dont have to either because the add method of my dao will just insert it and sql will generate a key for it. problem is when im trying to save a favorite ride i need to pass a favoritedto as argument but a favoritedto requires a id to be constructed, so i just put garbage number to construct it, there is no issue then all fine. problem is i dont think this is good written and i would refer to this as spaghetti code

195 replies

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