encounter error when trying search with AttributesToHighlight

[DomSiky]

I'm encounter json serialize error when trying search method to get documents via JAVA SDK,
here are the sample code.

here is the error stacktrace
Meilisearch ApiException: {Error=APIError: {message='Invalid value type at .attributesToHighlight: expected an array, but found a string: "**[Ljava.lang.String;@10fc5e2f**"', code='invalid_search_attributes_to_highlight', type='invalid_request', link='https://docs.meilisearch.com/errors#invalid_search_attributes_to_highlight'}}

pls refer the highlighted part, I noticed that org.json.JSONObject wrongly serialize the String arrary to [Ljava.lang.String;@10fc5e2f
any idea to reslove this issue? as workaround, I'm using JAVA API to do the search instead temporary.

Environment (please complete the following information):

• OS: windows 10
• Meilisearch version: v1.4.2
• meilisearch-java version: v0.11.5
• org.json version: 20231013, as sdk pom required

[Bruno Casali]

Do you know if that only happens when you try to use the SearchResultPaginated?

[songxy]

i have a similar issue when using SearchRequestBuilder.

by debug, i found that SearchRequest.toString() converted array fields like attributesToHighlight to [Ljava.lang.String;@xxxxxx instead of ["xxx", "yyy"]

the toString method uses org.json.JSONObject to convert object to json string. obviously the org.json.JSONObject can't handle array fields as we expect.

i found that the class i use is actually org.json.JSONObject from com.vaadin.external.google:android-json instead of org.json

if you remove com.vaadin.external.google:android-json from your project like below, the problem will be fixed.

 <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>com.vaadin.external.google</groupId>
            <artifactId>android-json</artifactId>
        </exclusion>
    </exclusions>
</dependency>

then it's easy to understand why some users meet this bug but the developers can't reproduce it(like #573)

more background information can be found here: https://stackoverflow.com/a/60952911/19414568

Environment (please complete the following information):

OS: macos 13.4.1

jdk: 21

springboot： 3.2.0

Meilisearch version: v1.5

meilisearch-java version: v0.11.5