'Cannot convert undefined or null to object' when SCHEMA is undefined

[guisouza]

Uncaught TypeError: Cannot convert undefined or null to object

When trying to instantiate an Entity Class without SCHEMA.

What about throwing something like :
SCHEMA definition under Entity <EntityName> is required.

Any other suggestion?

[guisouza]

or something more verbose like :

SCHEMA definition under Entity <EntityName> is required.
eg:
<EntityName> extends Speck{
    static SCHEMA = {<SchemaDefinition>}
}

[danielbdias]

I think that the first suggestion is simpler. If a user receives this error he can see the project README and see an example of the use of SCHEMA easily.

[jimmyandrade]

Had the same issue.

I was calling JSON.stringify for an object. One of its properties is an Array of an Entity.

TypeError: Cannot convert undefined or null to object
OmittedEntityName.toJSON
./node_modules/speck-entity/lib/Speck.js:205

Library code:

  202 | value: function toJSON() {
  203 |   var _this = this;
  204 | 
> 205 |   var rawData = Object.keys(this.data).reduce(function (data, field) {
      | ^  206 |     return _extends(data, _defineProperty({}, field, _this._fetchChild(_this.data[field])));
  207 |   }, {});
  208 | 

My code:

  13 | const omittedFunctionName = (parsedData) => {
  15 |   const {arrayOfEntities} = parsedData.omittedPropertyName;
> 16 |   return JSON.stringify({omittedKeyName: arrayOfEntities})
     | ^  17 | }

(I had to omit function, entities and variables names because of project NDA)