Offer(1).js

...

class Offer extends Component {
  componentDidMount () {
    const { dispatch, match: { params: { offerId } } } = this.props
    dispatch(requestData({
      apiPath: `/offers/${offerId}`,
      normalizer: {
        stocks: 'stocks'
      }
    }))
  }

  handleAddStock = available => () => {
    const { dispatch, match: { params: { offerId } } } = this.props
    dispatch(requestData({
      apiPath: '/stocks',
      body: {
        available,
        offerId
      },
      method: 'POST',
    }))
  }

  render () {
    const { offer, stocks } = this.props
    if (!offer) {
      return null
    }
    ...
  }
}
...