Variables

Technically, we could do string interpolation to make our queries dynamic. However, this wouldn't be a good idea because our client would be tasked with manipulating that string at runtime. Instead, Graphql provides us with first-class variables that allow us to factor-out the dynamic parts of a query (eg. userId, first: 10)

Variables must be either scalars, enums or input object types.

• Input Object Type: Passing in an object might be a more sensible solution than strings, if there is related data. For instance, imagine we are running a createUser mutation. Instead of passing first_name, last_name, as so on to the mutation, why not just define a type, and pass an object?:

mutation createUser($userInfo: UserInfoInput!) {
	createUser(userInfo: $userInfo)	{
		first_name
		last_last
	}
}

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Children

1. Directives