1 After obtaining the code, micro letter public authorization number of pages the second step, { "errcode" occurred while acquiring accesstoken: 40029, "errmsg": "invalid code, hints
Analysis: This is the second time my request, has been tested, so accesstoken fails, a second request should be refreshed accesstoken, should regain accesstoken third step of the method.
2 save data to the data table has been saved not on the error: Unknown column 'refresh_token' in 'field list, more than the development of the document fields refresh_token, can be removed