Go OData

import "github.com/Uffe-Code/go-odata"

go-odata is a library that desires to generate a fully functional OData API Client for Go.

Setup

To setup the library, add a go file to be executed on it's own. It should look something like this.

package main

import (
	"fmt"
	"github.com/Uffe-Code/go-odata/modelGenerator"
	"path/filepath"
)

func main() {
	directoryPath, err := filepath.Abs("dataModel/")
	if err != nil {
		fmt.Printf("error while looking up folder: %s", err.Error())
		return
	}
	generator := modelGenerator.Generator{
		ApiUrl:        "https://services.odata.org/TripPinRESTierService/(S(c0y0kjlx4yjoxry4otnmoxf4))/",
		DirectoryPath: directoryPath,
	}
	err = generator.GenerateCode()
	if err != nil {
		fmt.Printf("error while generating code: %s", err.Error())
		return
	}

	fmt.Printf("code generated successfully")
}

When executed, it will generate a file in the specified directory with all model definitions. You can then use the client.

Initialize the client

client := odataClient.New("https://services.odata.org/TripPinRESTierService/(S(c0y0kjlx4yjoxry4otnmoxf4))/")

Client wrapper

If you want to implement your own logic around the client, implement the Wrapper interface by adding a method called "ODataClient()" that will return the raw client. If you do, then the wrapper can be used to fetch data sets.

Get data set for model

client := odataClient.New("https://services.odata.org/TripPinRESTierService/(S(c0y0kjlx4yjoxry4otnmoxf4))/")
peopleCollection := dataModel.NewPeopleCollection(client)
dataSet := peopleCollection.DataSet()

List data from API

data, errs := dataSet.List(odataClient.ODataFilter{
	filter: "Name eq 'Foo'"
})
for err := range errs {
    fmt.Printf("%s", err.Error())
    return
}
for model := range data {
    fmt.Println(model.Name)
}

Create new record

person := dataModel.Person{
	Name: "Foo",
}
insertedPerson, err := dataSet.Insert(person)
fmt.Printf("%d", insertedPerson.PersonId)

Update a record

person := dataModel.Person{
	Name: "Foo",
}
updatedPerson, err := dataSet.Update(5, person)
fmt.Printf("%d", updatedPerson.PersonId) // 5