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'use strict'
module.exports = (sequelize, DataTypes) => {
  var group = sequelize.define('group', {
    id: {
      allowNull: false,
      autoIncrement: true,
      primaryKey: true,
      type: DataTypes.INTEGER
    },
    name: DataTypes.STRING,
    description: DataTypes.STRING
  }, {
    timestamps: false
  })
  group.associate = function (models) {
    var GroupXGroup = sequelize.define('group_x_group', {}, { timestamps: false, freezeTableName: true })
    group.belongsToMany(group, { as: 'parents', through: GroupXGroup, foreignKey: 'childId', otherKey: 'parentId'})
  }
  return group
}