Hi All,
I have a query with an interface as a return type.
To know which types were requested by the customer I’m trying, without a success, to parse selectionSetGraphQ.
Example:
‘{\n … on Dog {\n name\n color\n }\n name\n … on Cat {\n name\n type\n }\n … on Cow {\n birthday\n color\n }\n}’
do you have any idea how to parse the string mentioned above?
The graphql-js parse function will give you an AST. You can then use the visit function to traverse the AST and collect information from it.
I think this is what you want, but it should at least give you a good idea of where to go if not 
import { parse, visit } from 'graphql';
const ast = parse('...');
const concreteTypes = [];
visit(ast, {
InlineFragment(node) {
if (node.typeCondition) {
concreteTypes.push(node.typeCondition.name.value);
}
}
});
Thank you for your response! Do you know if it’s also available in Python?