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  • Andy 13 posts 54 karma points
    Apr 08, 2020 @ 17:07
    Andy
    0

    How to get all pages by document type using Umbraco API and spit out data into Json?

    Hi all,

    So as the title suggests I have created a document type called 'clients' with a few basic properties, some strings called 'clientname' and 'clientage'.

    I've built a controller using the umbracoApi: 

    [System.Web.Http.Route("api/{controller}")]
public class ApiController : UmbracoApiController
{
    [System.Web.Http.HttpGet]
    public string GetAllPages()
    {
        var content = Umbraco.ContentAtRoot().FirstOrDefault().DescendantsOfType("clients");

        var stuff = JsonConvert.SerializeObject(content);

        return stuff;
    }

}

    but when I try to call the endpoint in my postman I get this error:

    "Self referencing loop detected for property 'ContentType' with type 'Umbraco.Core.Models.PublishedContent.PublishedContentType'. Path '[0].ContentType.PropertyTypes[0]'."

    aside from the json output, am I getting the pages correctly via the api?

    Grateful for any help on the matter!

    Andy

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  • Malthe Petersen 68 posts 383 karma points c-trib
    Apr 08, 2020 @ 17:48
    Malthe Petersen
    0

    Hi Andy.

    Instead of returning the serialized string, you should be able to return IEnumerable<IPublishedContent>.

    Not sure whether you would get the same error. But it is worth the try. :-)

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  • Andy 13 posts 54 karma points
    Apr 08, 2020 @ 18:20
    Andy
    0

    Hi! Thanks for your answer.

    I changed it to 

        public IEnumerable<IPublishedContent> GetAllPages()
    {
        var content = Umbraco.ContentAtRoot().FirstOrDefault().DescendantsOfType("clients");


        return content;
    }

    however I am not getting this error:

    The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8

    it needs to be serialized into json as I was doing in my initial post, probably not doing it right but unsure where I am going wrong!

    Andy

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  • Malthe Petersen 68 posts 383 karma points c-trib
    Apr 08, 2020 @ 19:51
    Malthe Petersen
    0

    Hmm..

    What about the settings they suggest in answer 1: https://stackoverflow.com/questions/13510204/json-net-self-referencing-loop-detected

    Does that help? :-)

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