Problems with createFromJsonArray(@RequestBody String json)

[Borius]

Hi,
I am newbie in Spring Roo, so I have problems

I have 3 domain classes

entity --class ~.domain.Lang --testAutomatically 
field string --fieldName name --sizeMin 2 --sizeMax 20 --notNull

entity --class ~.domain.Category --testAutomatically 
field string --fieldName name --sizeMin 2 --sizeMax 30  --notNull

entity --class ~.domain.Text --testAutomatically 
field reference --fieldName lang --type ~.domain.Lang --notNull 
field reference --fieldName category --type ~.domain.Category --notNull
field string --fieldName title --notNull --sizeMax 100
field string --fieldName author --sizeMax 100
field string --fieldName text --notNull --sizeMax 200000 --sizeMin 1000

I send by POST to
http://localhost:8080/TextCuter/lang/jsonArray [{"name" : "en"}]
and to
http://localhost:8080/TextCuter/category/jsonArray [{"name" : "it"}]

That works fine (and now I have category and language, both with id == 1)

Then I want to create some Text
I send to http://localhost:8080/text/lang/jsonArray [{"category" : 1, "lang" : 1, ...}]
and it doesn't work... (validation failed)

When I try to add this Text using browser and auto generated form it works well.

What do I wrong?

[Stefan Schmidt]

It would depend on how your exact json document for lang looks like. To see how the document should look like you can first create a new lang via the MVC form and then do a json get to see the json version of that document. Based on this format you should be able to do a json post successfully. If that does not work it is probably best if you zip up your project (use the backup command) and attach it here or to a Jira ticket.

[Borius]

Hi Stefan,
Thank you for answer, but i still have a problems.

It would depend on how your exact json document for lang looks like. To see how the document should look like you can first create a new lang via the MVC form and then do a json get to see the json version of that document. Based on this format you should be able to do a json post successfully. If that does not work it is probably best if you zip up your project (use the backup command) and attach it here or to a Jira ticket.

Sorry I made a mistake

I sent to http://localhost:8080/text/learn/jsonArray [{"category" : 1, "lang" : 1, ...}]

When I try to send to http://localhost:8080/text/learn with post data: ?category=1&lang=1&....(same other param) it works.

JSON structure for ~domain.Text is: (return this when I request http://localhost:8080/TextCuter/learn/1")
{
"author":null,
"category":{"id":1,"name":"bb","version":0},
"id":1,
"lang":{"id":1,"name":"aa","version":0},
"text":"abcdefg abcdefg......",
"title":"title",
"version":0
}


There is no need to backup all project there is just few roo comands

persistence setup --database MYSQL --provider HIBERNATE --databaseName textcut

entity --class ~.domain.Lang --testAutomatically 
field string --fieldName name --sizeMin 2 --sizeMax 20 --notNull

entity --class ~.domain.Category --testAutomatically 
field string --fieldName name --sizeMin 2 --sizeMax 30  --notNull

entity --class ~.domain.Text --testAutomatically 
field reference --fieldName lang --type ~.domain.Lang --notNull 
field reference --fieldName category --type ~.domain.Category --notNull
field string --fieldName title --notNull --sizeMax 100
field string --fieldName author --sizeMax 100
field string --fieldName text --notNull --sizeMax 200000 --sizeMin 1000

web mvc setup
web mvc scaffold --class ~.web.LearnController --backingType ~.domain.Text --path /learn 
web mvc scaffold --class ~.web.LanguageController --backingType ~.domain.Lang --path /language 
web mvc scaffold --class ~.web.CategoryController --backingType ~.domain.Category --path category

json all

[Stefan Schmidt]

Borius,

You need to make sure the HTTP headers are set correctly when sending your JSON document. Furthermore, you need to define the identifiers of the referenced entities like this:

curl -i -X POST -H Accept:application/json -H Content-Type:application/json -d '{"author":"test author","category":{"id":2},"lang":{"id":1},"text":"test [......]","title":"test title"}'

Hope this helps.

[Stefan Schmidt]

I should mention it also works for JSON arrays the same way:

curl -i -X POST -H Accept:application/json -H Content-Type:application/json -d '[{"author":"test6","category":{"id":2},"lang":{"id":1},"text":"[...]","title":"test6"},{"author":"test5","category":{"id":2},"lang":{"id":1},"text":"test [...]","title":"test5"}]' http://localhost:8080/text/learn/jsonArray