Datasource create sends incorrect parameter to rails server

[Fajar]

Hi there,

I am struggling with datasource create transport. While normally the correct parameter to a rails server for creating a new item is as follow: 

Started POST "/shoes" for 127.0.0.1 at 2012-03-10 18:10:32 +0700
Processing by ShoesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"QrQCjdrZTYpNCbCDeh8iCxSbUdFo7aTHg+GeGKTpNuA=", "shoe"=>{"name"=>"the correct format", "price"=>"", "url"=>"", "replacement_mileage"=>""}, "commit"=>"Create Shoe"}

But kendoui's data source create transport sends the following format:

Started POST "/shoes.json" for 127.0.0.1 at 2012-03-10 18:10:35 +0700
Processing by ShoesController#create as JSON
  Parameters: {"name"=>"shoename"}

Thank you in advance.

My script is as follow:

Item = kendo.data.Model.define({id: "id"});
dataSource = new kendo.data.DataSource({
     transport: {
        read: {
url: ("shoes.json")
        },
create: {
url: "shoes.json",
type: "POST"
}
     },
schema: {
model: Item
},
});
dataSource.read();
$("#items").html(kendo.render(template, dataSource.view()));
dataSource.add({"name": "shoename"});
dataSource.sync();

[Petyo]

Hi,

You can use the parameterMap DataSource configuration option to transform the object to the desired data structure. 

Kind regards,
Petyo
the Telerik team

[Oscar]

I'm not sure is it the best way to do, however I can get it work.
I really don't like the document of KendoUI, sometime it is so difficult to read, and there isn't enough information for you to learn how to use it.

dataSource = new kendo.data.DataSource({
  transport: {
    read: {
        url: ("shoes.json")
    },
    create: {
        url: "shoes.json",
        type: "POST"
    },
    parameterMap: function(data, type) {
     if (type !== "read" && data) {
       // the demo code is using kendo.stringify(data), however I cant get it work.
       r_data = {shoe: data};
       // for create, will POST {shoe: {name: "new", price: "2", id:""}
       if (type === "update") {
        r_data = {shoe: { name: data.name, price: data.price, url: data.url, replacement_mileage: data.replacement_mileage, id: data.id} };
        // for update, will PUT {shoe: {name:"ABC", price:"1", url:"google.com", replacement_mileage:"1", id:"1"}}
       }
       return r_data;
     }
     return data
    }
  },
    schema: {
        model: Item
    },
});

Here is the example code for the parameterMap that can be used with rails.
And for update part, there will be mass assignment problem(created_at/updated_at/etc.), so I specified the data that PUT to server.