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57 lines
1.5 KiB
57 lines
1.5 KiB
'use strict'; |
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Object.defineProperty(exports, '__esModule', { |
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value: true, |
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}); |
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exports.NoUnusedVariablesRule = NoUnusedVariablesRule; |
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var _GraphQLError = require('../../error/GraphQLError.js'); |
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/** |
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* No unused variables |
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* |
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* A GraphQL operation is only valid if all variables defined by an operation |
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* are used, either directly or within a spread fragment. |
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* |
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* See https://spec.graphql.org/draft/#sec-All-Variables-Used |
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*/ |
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function NoUnusedVariablesRule(context) { |
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let variableDefs = []; |
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return { |
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OperationDefinition: { |
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enter() { |
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variableDefs = []; |
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}, |
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leave(operation) { |
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const variableNameUsed = Object.create(null); |
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const usages = context.getRecursiveVariableUsages(operation); |
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for (const { node } of usages) { |
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variableNameUsed[node.name.value] = true; |
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} |
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for (const variableDef of variableDefs) { |
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const variableName = variableDef.variable.name.value; |
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if (variableNameUsed[variableName] !== true) { |
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context.reportError( |
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new _GraphQLError.GraphQLError( |
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operation.name |
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? `Variable "$${variableName}" is never used in operation "${operation.name.value}".` |
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: `Variable "$${variableName}" is never used.`, |
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{ |
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nodes: variableDef, |
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}, |
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), |
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); |
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} |
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} |
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}, |
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}, |
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VariableDefinition(def) { |
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variableDefs.push(def); |
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}, |
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}; |
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}
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