运行dyson模拟服务器（使用express.js）的异常“ TypeError：对象原型只能是对象或为空”

Question

Running the webpro/dyson-demo (node.js) as a mock server and attempted to return a canned data, for example:

module.exports = {
  path: '/query?',
  collection: false,
  template: function(params, query, body, cookies, headers) {
        return cannedJsonFromFile;
    },

};

But received the error message (dyson uses Express.js):

"Potentially unhandled rejection [1] TypeError: Object prototype may only be an Object or null: ..." (bottom of stack): at c:\\dev\\projects\\noms\\navmps.services.demo\\dyson-mock-oob-server\\dyson-demo\\node_modules\\dyson\\lib\\response.js:82:53

Answer 1

The canned data was loaded as a JSON string '{...}' and needed to be converted to a an object using JSON.parse:

module.exports = {
  path: '/query?',
  collection: false,
  template: function(params, query, body, cookies, headers) {
        return JSON.parse(cannedJsonFromFile);
    },

};