Method _getIncludedAssociation

lib/model.js:715–740

(targetModel, targetAlias)

  }

  static _getIncludedAssociation(targetModel, targetAlias) {
    const associations = this.getAssociations(targetModel);
    let association = null;
    if (associations.length === 0) {
      throw new sequelizeErrors.EagerLoadingError(`${targetModel.name} is not associated to ${this.name}!`);
    }
    if (associations.length === 1) {
      association = this.getAssociationForAlias(targetModel, targetAlias);
      if (association) {
        return association;
      }
      if (targetAlias) {
        const existingAliases = this.getAssociations(targetModel).map(association => association.as);
        throw new sequelizeErrors.EagerLoadingError(`${targetModel.name} is associated to ${this.name} using an alias. ` +
          `You've included an alias (${targetAlias}), but it does not match the alias(es) defined in your association (${existingAliases.join(', ')}).`);
      }
      throw new sequelizeErrors.EagerLoadingError(`${targetModel.name} is associated to ${this.name} using an alias. ` +
        'You must use the \'as\' keyword to specify the alias within your include statement.');
    }
    association = this.getAssociationForAlias(targetModel, targetAlias);
    if (!association) {
      throw new sequelizeErrors.EagerLoadingError(`${targetModel.name} is associated to ${this.name} multiple times. ` +
        'To identify the correct association, you must use the \'as\' keyword to specify the alias of the association you want to include.');
    }
    return association;
  }


  static _expandIncludeAll(options) {