Roughing out the demo app

node_modules/json-server/lib/server/router/validate-data.js

@@ -0,0 +1,18 @@
+"use strict";
+
+const _ = require('lodash');
+
+function validateKey(key) {
+  if (key.indexOf('/') !== -1) {
+    const msg = [`Oops, found / character in database property '${key}'.`, '', "/ aren't supported, if you want to tweak default routes, see", 'https://github.com/typicode/json-server/#add-custom-routes'].join('\n');
+    throw new Error(msg);
+  }
+}
+
+module.exports = obj => {
+  if (_.isPlainObject(obj)) {
+    Object.keys(obj).forEach(validateKey);
+  } else {
+    throw new Error(`Data must be an object. Found ${typeof obj}.` + 'See https://github.com/typicode/json-server for example.');
+  }
+};