belongsTo computed uses diferrent url to fetch related then BelongsToReference.load

[janmisek]

BelongsTo computed retrieves model using:

this._internalModel._relationships.get(key).getRecord();

but BelongsToReference.load internally incorporates decision:

 if (this.remoteType() === "id") {
    return this.belongsToRelationship.getRecord();
  }

  if (this.remoteType() === "link") {
    return this.belongsToRelationship.findLink().then((internalModel) => {
      return this.value();
    });
  }

Above results in different url used to fetch the record when related record id and type is suplied by parent record JSON API.