| // @flow strict |
| |
| import { GraphQLError } from '../../error/GraphQLError'; |
| |
| import { print } from '../../language/printer'; |
| import { type ASTVisitor } from '../../language/visitor'; |
| import { type VariableDefinitionNode } from '../../language/ast'; |
| |
| import { isInputType } from '../../type/definition'; |
| |
| import { typeFromAST } from '../../utilities/typeFromAST'; |
| |
| import { type ValidationContext } from '../ValidationContext'; |
| |
| /** |
| * Variables are input types |
| * |
| * A GraphQL operation is only valid if all the variables it defines are of |
| * input types (scalar, enum, or input object). |
| */ |
| export function VariablesAreInputTypesRule( |
| context: ValidationContext, |
| ): ASTVisitor { |
| return { |
| VariableDefinition(node: VariableDefinitionNode): ?GraphQLError { |
| const type = typeFromAST(context.getSchema(), node.type); |
| |
| if (type && !isInputType(type)) { |
| const variableName = node.variable.name.value; |
| const typeName = print(node.type); |
| |
| context.reportError( |
| new GraphQLError( |
| `Variable "$${variableName}" cannot be non-input type "${typeName}".`, |
| node.type, |
| ), |
| ); |
| } |
| }, |
| }; |
| } |