Page:: get_result()

This method returns the selected primary key and its friend(friend is a foreign key)

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async get_result(): Promise<crud_result>{

Description

Get the currently selected table-row(tr) from the theme panel as there has to be one from check -time.

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        const tr = <HTMLTableRowElement>this.theme.target!.querySelector(".TR");

Get the primary key of the selected table-row(tr) as an auto number.

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        const pk = tr.getAttribute("pk");

Check the returned primary key selection which has to be a string, whereas if the value is not a string then an error occurred i.e. the last save was not successful. Then return the user defined error.

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  if (pk == null)
            throw new schema.mutall_error(`The primary key for a selected tr not found`);

Get the foreign key(friend) component of the record and there must be one. Compile the valid selection and return the primary key and the friend(foreign key).

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        const friend = tr.getAttribute("friend")!;
        if (friend === null) {
            throw new schema.mutall_error(`The friendly component of tr ${pk} is not found`);
        }
    //
   return {pk, friend};
    }