Field name different from column name in db - node.js

Question

I just started using graphql with mysql, i would like to know if it is possible to use a name in the graphql query different from the column name in my data base.
For example i have a table users with the columns userName and password, when i define the type for the schema i have the following:
const unidadesMedidaInternaType = new GraphQLObjectType({
name: 'unidadesMedidaInterna',
fields: () => ({
userName: { type: GraphQLID },
password: { type:GraphQLString }
})
});
the resolver:
resolve (parent, args) {
return pool.query(`SELECT * FROM users`);
}
so i have to query like this:
{
users {
userName,
password
}
}
i would like to have different names in the query like this:
{
users {
Name,
secret
}
}
i tried changing the names of the fields in the type definition but the result of the query is full of nulls values.

Answer 1

In order to have different names in the queries you have 2 options:
Option 1: Use aliases to run the query:
You can run your query with aliases like
{
users {
Name: userName,
secret: password
}
}
In this case you are just renaming the fields name on execution time, so the original names will still be available to query.
Option 2: Map the query result to the GraphQLObject type.
First rename the fields:
const unidadesMedidaInternaType = new GraphQLObjectType({
name: 'unidadesMedidaInterna',
fields: () => ({
Name: { type: GraphQLID },
secret: { type:GraphQLString }
})
});
Then map the result of the query to match the fields:
resolve (parent, args) {
const result = pool.query(`SELECT * FROM users`);
// If the result of the query is an array then you have to map its items
return { Name: result.userName, secret: result.password }
}