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Java

Posted by Jose Patria
Jose Patria
1,600 Points

Spring is not recognizing my variables expressions

The ide does not recognize the expression variables ${gif.name} and send me a error but the compilations works perfect. What did i do wrong?

<img th:src="@{'/gifs/' + ${gif.name} + '.gif'}" alt="gif" />

@RequestMapping(value = "/gif")
public String gifDetails(ModelMap modelMap){
    Gif gif = new Gif("compiler-bot", LocalDate.of(2017,06,06),"Jose Tomas", true);
    modelMap.put("gif",gif);
    return "gif-details";
}

}

4 Answers

Jose Patria
Jose Patria
1,600 Points

When i compile the code works fine but the ide keep showing me this. "Validates unresolved references and invalid expressions."

In my Gif.class i have

package com.teamtreehouse.giflib.model;

import java.time.LocalDate;

public class Gif { private String name; private LocalDate dateUploaded; private String username; private boolean favorite;

public Gif(String name, LocalDate dateUploaded, String username, boolean favorite) {
    this.name = name;
    this.dateUploaded = dateUploaded;
    this.username = username;
    this.favorite = favorite;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public LocalDate getDateUploaded() {
    return dateUploaded;
}

public void setDateUploaded(LocalDate dateUploaded) {
    this.dateUploaded = dateUploaded;
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public boolean isFavorite() {
    return favorite;
}

public void setFavorite(boolean favorite) {
    this.favorite = favorite;
}

}

Anders Björkland
Anders Björkland
7,481 Points

Is it anything like what is described over at IntelliJ's bug report site: https://youtrack.jetbrains.com/issue/IDEA-132738
...then it might be a bug of the IDE, and their suggested workaround is this:

You can use Alt+Enter shortcut to invoke intention "Declare external variable in comment annotation" in order to get rid of "unresolved model attribute" in your views.

Anders Björkland
Anders Björkland
7,481 Points
Anders Björkland
Anders Björkland
7,481 Points

Maybe you have not got a method getName() in your Gif class?

Jose Patria
Jose Patria
1,600 Points
Jose Patria
Jose Patria
1,600 Points

Wow really looks like is a bug. My template looks broke so is pretty sad. Thx mate!

Anders Björkland
Anders Björkland
7,481 Points

Ah, that's a bummer. Glad to help!

Marek Dybuść
Marek Dybuść
4,930 Points
Marek Dybuść
Marek Dybuść
4,930 Points 
<!--/*@thymesVar id="gif" type="com.treehouse.smykk.giflib.model.Gif"*/-->
<img th:src="@{'/gifs/' + ${gif.getName()} +'.gif'}" alt="gif" />

...worked for me after changing 'gif.name' to 'gif.getName()', and declaring external variable in comment annotation as suggested by IntelliJ. That behavior would suggest that the 'name' field in POJO should be public in order for 'gif.name' to be recognized.