graphql-paper/graphql/create-schema.js

A flexible in-memory store based on a GraphQL Schema

'use strict';

var graphql = require('graphql');
function copySchema(schema) {
  return graphql.buildSchema(graphql.printSchema(schema));
}
function createSchema(schema) {
  if (graphql.isSchema(schema)) return copySchema(schema);
  if (typeof schema === 'object' && schema.kind === 'Document') {
    try {
      return graphql.buildASTSchema(schema);
    } catch (error) {
      throw new Error('Unable to build a schema from the AST Schema passed into the `graphqlSchema` dependency. Failed with error:\n\n' + error.message);
    }
  }
  if (typeof schema === 'string') {
    try {
      return graphql.buildSchema(schema);
    } catch (error) {
      throw new Error('Unable to build a schema from the string passed into the `graphqlSchema` dependency. Failed with error:\n\n' + error.message);
    }
  }
  throw new Error('Unable to build schema, pass in an instance of schema or a string');
}
exports.createSchema = createSchema;
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