marsh axle
even AI can't help me anymore. I'm developing an API with SpringBoot and im trying to send a post request through Postman. I've checked both Content-Type and Accept Headers, but the problem is still there. The changes affect the database, as if no problem was caught.
The controller class is just fine, I don't know what more could be the problem. If I'm lacking any details to understand the problem, please point it out.
ebon sphinxBOT
<@&987246584574140416> please have a look, thanks.
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TJ-Bot
echo mural
you need to check the entire spring boot debug log, sometimes 500 Internal Server Error seems to happen out of nowhere, but in reality its cause is much earlier in the log
marsh axle
the log says that there is no converter for [class.java.util.LinkedHashMap] with preset Content-Type 'text/html;charset=UTF-8']
echo mural
can you send the full error, and relevant code?
marsh axle
one moment
controller:
@PostMapping("/save")
public Expense save(@RequestBody Expense expense){
return expenseService.save(expense);
}
model (not using lombok):
public Expense(String descr, BigDecimal value, LocalDate date, Long userId){
this.descr = descr;
this.value = value;
this.date = date;
this.userId = userId;
}
public Long getId() {
return id;
}
public String getDescr() {
return descr;
}
public BigDecimal getValue() {
return value;
}
public LocalDate getDate() {
return date;
}
public Long getUserId(){
return userId;
}
public void setDescr(String descr) {
this.descr = descr;
}
public void setValue(BigDecimal value) {
this.value = value;
}
public void setDate(LocalDate date) {
this.date = date;
}
public void setUserId(Long userId){
this.userId = userId;
}
}
service:
public Expense save(Expense expense){
return expenseRepository.save(expense);
}
ill send the full error in just a minute
2025-10-23T15:25:39.939-03:00 WARN 82352 --- [financectrl] [nio-8080-exec-6] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotWritableException: No converter for [class java.util.LinkedHashMap] with preset Content-Type 'text/html;charset=UTF-8']
echo mural
This could be a json issue, json objects are sometimes represented as linkedhashmaps. It might be worth it to try marking the constructor as @JsonCreator
If not, I am not surr
marsh axle
ok, I'll take a look at JsonCreator
but since I'll be using the API through the web, making html requests (url-encoded), probably I just shouldn't care about that, right?
maybe I am the one creating problems where they shouldn't be
echo mural
but since I'll be using the API through the web, making html requests (url-encod...
If a post request fails, it doesnt matter how you send it, it wont work
marsh axle
but that's the thing, it does work, I can see the changes in PgAdmin, the problem is that the API isn't returnig JSON to Postman
echo mural
Just try JsonCreator really quickly, in the end you might use json down the road anyway
echo mural
No problem, lmk if it worked
marsh axle
Just try JsonCreator really quickly, in the end you might use json down the road...
got the exact same warning 😭
AI told me to force ResponseEntity on the controller method
echo mural
Try it. In my project I do something like ResponseEntity<Void> fo the return type, and return ResponseEntity.no_content(). build or something like that
echo mural
Nw