antd Form表单中select设置初始值

<Form.Item label="作用对象">
                      {getFieldDecorator('targetId',  { initialValue: this.state.targetId }, {
                          rules: [{
                              required: false,
                              message: '作用对象'
                          }]
                      })(
                          <Select placeholder="请选择作用对象">
                              {targetList.map(entity => <Option key={entity.id} value={entity.id}>{entity.name}</Option>)}
                          </Select>
                      )}
                  </Form.Item>

在

getFieldDecorator('targetId',时添加初始值而不是在select标签中添加初始值