Re: [pgAdmin4][RM#3235] Code refactoring in Query tool - Mailing list pgadmin-hackers

Hi Murtuza

It is really good to see other patches that are just refactoring code.

We have some suggestions:

- We are trying to use === instead of == because === ensure that the type is also checked (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Equality_comparisons_and_sameness)

- Now that we are refactoring some code, maybe we should keep some consistency on the way we name functions and variables. 

We should use camelCase for names instead of snake_case. In general, if you see a function or variable name that doesn't fit the desired syntax or if a block of code seems confusing, it is better to refactor it.

- By the name of the function is_new_transaction_required, it describes what the function represents but doesn't seem to explain the full scope of the function. What do you think about the name: httpResponseRequiresNewTransaction  

- The extraction doesn't look like it matches the code removed 

-            if (pgAdmin.Browser.UserManagement.is_pga_login_required(e)) {

-              self.save_state('_explain_timing', []);

-              return pgAdmin.Browser.UserManagement.pga_login();

-            }

-

-            if(transaction.is_new_transaction_required(e)) {

-              self.save_state('_explain_timing', []);

-              return self.init_transaction();

-            }

-

-            alertify.alert(gettext('Explain options error'),

-              gettext('Error occurred while setting timing option in explain.')

+            let msg = httpErrorHandler.handleQueryToolAjaxError(

+              pgAdmin, self, e, '_explain_timing', null, true

             );

+            alertify.alert(gettext('Explain options error'), msg);

In this case we are only saving state if the following conditions are true: 

isNotConnectedToThePythonServer and httpResponseJSONIsPresent and connectionLostToPostgresDatabase and shouldSaveState

That is not the case on the removed code.

- The functions extracted when are called do not use all the parameters. This tells us that the function groups too much functionality that is not used in same cases. Maybe we should split this function into smaller functions that do each part.

Thanks

Victoria & Joao

On Tue, Apr 3, 2018 at 11:38 AM Murtuza Zabuawala <murtuza.zabuawala@enterprisedb.com> wrote:

Hi Dave,

PFA updated patch, I've renamed it to query_tool_http_error_handler.js & query_tool_http_error_handler_spec.js respectively. 

--

Regards,

Murtuza Zabuawala
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

On Tue, Apr 3, 2018 at 7:43 PM, Dave Page <dpage@pgadmin.org> wrote:

HI

On Tue, Apr 3, 2018 at 12:27 PM, Murtuza Zabuawala <murtuza.zabuawala@enterprisedb.com> wrote:

Hi,

PFA patch to extract the common code from query tool to handle ajax errors & connection handling, Also added unit tests around extracted code. 

Looks good to me, except, I wonder if we should rename is_new_transaction_required.js/is_new_transaction_required_spec.js to something a little more generic; maybe conn_tx_handler_funcs.js? Not sure I like that though.

--

Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake

EnterpriseDB UK: http://www.enterprisedb.com
The Enterprise PostgreSQL Company