How to add custom links to non repository rest controller in spring data rest hal?

问题

I would like to add custom rest controller to be added to the json/hal response of the entry point, together with all the respositories that are added by spring. I'm struggling with this by two problems:

How can I add my custom controller so it appears on the entry point together with the links to my repository?
How can I decorate with a link to my custom controller on a representation of an entity produced by the repository so I can link to my custom controller?

I have struggled for a while and created a github project using spring-data-mongodb to demonstrate what I mean. There is one simple Entity Invoiceand the InvoiceRepository which extends MongoRepository and has one special finder Method List<Invoice> findByFirstName(@Param("firstName")String firstName);. In addition there are two custom controller that I would like to be included in the _links section on the entry point of the service-

Using the Hal Browser, the entry point at the moment looks like

{
  "_links": {
    "invoices": {
      "href": "http://localhost:8080/customize/invoices{?page,size,sort}",
      "templated": true
    },
    "profile": {
      "href": "http://localhost:8080/customize/profile"
    }
  }
}

But I would like it to be

  "_links": {
    "invoices": {
      "href": "http://localhost:8080/customize/invoices{?page,size,sort}",
      "templated": true
    },
    "export": {
      "href": "http://localhost:8080/customize/export/invoices"
    },
     "custom":{
      "href": "localhost:8080/customize/invoices/search/customList"
    }   
    "profile": {
      "href": "http://localhost:8080/customize/profile"
    }
  }

To the second part of my question, I have no Idea how to achieve. The JSON representation of an invoice looks like

{
  "firstName": "Chuck",
  "lastName": "Noris",
  "amount": 2.5,
  "exported": false,
  "_links": {
    "self": {
      "href": "http://localhost:8080/customize/invoices/27490450945023268364302849904"
    },
    "invoice": {
      "href": "http://localhost:8080/customize/invoices/27490450945023268364302849904"
    }
  }
}

I would like to extend it with custom export link to each invoice like this

{
  "firstName": "Chuck",
  "lastName": "Noris",
  "amount": 2.5,
  "exported": false,
  "_links": {
    "self": {
      "href": "http://localhost:8080/customize/invoices/27490450945023268364302849904"
    },
    "invoice": {
      "href": "http://localhost:8080/customize/invoices/27490450945023268364302849904"
    }
    "export": {
      "href": "http://localhost:8080/customize/export/invoice/27490450945023268364302849904"
    }
  }
}

回答1:

As commented by Alan the answers are already given on StackOverflow:

For other readers I'have updated my Github Project with a sample implementation of both UseCases. Enjoy at spring-data-rest-hal-custom.

来源：https://stackoverflow.com/questions/42972766/how-to-add-custom-links-to-non-repository-rest-controller-in-spring-data-rest-ha

标签

spring-data-mongodb

spring-data-rest

spring-hateoas