实体未呈现react.js

Question

I have a react.js application with changed status. I want to display to user some data using Entity . The problem is, in the first time being rendered it's ok, but the component do not response to the changes behind. This works fine:

getPaymentData() {
    let data = "";
    switch (this.props.params.type) {
        case "success":
            if (this.state.validate)
                data = 'The_payment_was_received' ;
            else
                data = 'Checking' ;
            break;
        case "error":
            data='There_was_an_error';
            break;
        case "cancel":
            data='The_payment_was_canceled' ;
            break;
    }
    return  data
}

and in the render method:

<h2 style={{marginBottem :"10px"}}>   { ::this.getPaymentData()} </h2>

but - when I do this, it is not responding.

case "cancel":
    data='The_payment_was_canceled';
    break;
}
return  <Entity entity= data>

or

<h2 style={{marginBottem :"10px"}}>  <Entity entity={ ::this.getPaymentData()} /> </h2>

Why?

Answer 1

<Entity entity= data> is incorrect. Use

<Entity entity={ ::this.getPaymentData()} /> seems incorrect to me. Why :: is for? Use