redux - 反应本机mapDispatchToProps不起作用

我无法使mapDispatchToProps正常工作。

我导出一个CombineReducers：

export default combineReducers({
  auth: AuthReducer,
  tenants: TenantsReducer
});

租户减少者：

const INITIAL_STATE = {
  error: false,
  data: [],
  tenantData: {},
};

export default (state = INITIAL_STATE, action) => {
  switch (action.type) {
    case GET_TENANTS_DATA:
      return { ...state, error: false, data: action.payload };
    case GET_TENANT_DATA:
        return { ...state, error: false, tenantData: action.payload };
    default:
      return state;
  }
};

然后我的动作中有getTenantByID方法

export const getTenantByID = ({ tenantID }) => {
  return (dispatch) => {
    const getTenant = {
      FirstName: 'Jonh', LastName: 'Doe', Email: 'jonh@test.com', Phone: 'xxx-xxx-xxxx',
      Unit: '101', MiddleName: '',
    };
    dispatch({
      type: GET_TENANT_DATA,
      payload: getTenant
    });
  };
};

最后，我尝试在组件中使用它。

import { connect } from 'react-redux';
import { getTenantByID } from '../actions';
...

componentDidMount() {
    const { navigation } = this.props;
    const tenantID = navigation.getParam('tenantID', '0');
    this.props.getTenantByID(tenantID);
      console.log(this.props); 
    this.state = {
      tenantData: this.props.tenantData
    };
  }

const mapStateToProps = ({ tenants }) => {
  return {
    error: tenants.error,
    tenantData: tenants.tenantData
  };
};

const mapDispatchToProps = () => {
     return {
          getTenantByID
     };
};

export default connect(mapStateToProps, mapDispatchToProps)(TenantDetails);

在我的componentDidMount中，console.log（this.props）为tenantData返回一个空对象。我究竟做错了什么？

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