Using SQL Alchemy in python to obtain x most recent items











up vote
-2
down vote

favorite












I am trying to make a nested list RECENT_STORES of the x most recently ordered from stores that has their name from the table store and time_ordered from the table shipment. They are connected via shipment.store_id and store.id



How do I write a sqlalchemy query (db.session.query...) so that I do the following in order (in psuedocode):




  1. get most recent shipment by time_ordered

  2. if shipment.store_id not in RECENT_STORES:

  3. append store.name and shipment.time_ordered to RECENT_STORES at index x where shipment.store_id == store.id

  4. else: get next most recent shipment by time_ordered and repeat the same checks






python python-2.7 sqlalchemy







share|improve this question


























    up vote
    -2
    down vote

    favorite












    I am trying to make a nested list RECENT_STORES of the x most recently ordered from stores that has their name from the table store and time_ordered from the table shipment. They are connected via shipment.store_id and store.id



    How do I write a sqlalchemy query (db.session.query...) so that I do the following in order (in psuedocode):




    1. get most recent shipment by time_ordered

    2. if shipment.store_id not in RECENT_STORES:

    3. append store.name and shipment.time_ordered to RECENT_STORES at index x where shipment.store_id == store.id

    4. else: get next most recent shipment by time_ordered and repeat the same checks






    python python-2.7 sqlalchemy







    share|improve this question
























      up vote
      -2
      down vote

      favorite









      up vote
      -2
      down vote

      favorite











      I am trying to make a nested list RECENT_STORES of the x most recently ordered from stores that has their name from the table store and time_ordered from the table shipment. They are connected via shipment.store_id and store.id



      How do I write a sqlalchemy query (db.session.query...) so that I do the following in order (in psuedocode):




      1. get most recent shipment by time_ordered

      2. if shipment.store_id not in RECENT_STORES:

      3. append store.name and shipment.time_ordered to RECENT_STORES at index x where shipment.store_id == store.id

      4. else: get next most recent shipment by time_ordered and repeat the same checks






      python python-2.7 sqlalchemy







      share|improve this question













      I am trying to make a nested list RECENT_STORES of the x most recently ordered from stores that has their name from the table store and time_ordered from the table shipment. They are connected via shipment.store_id and store.id



      How do I write a sqlalchemy query (db.session.query...) so that I do the following in order (in psuedocode):




      1. get most recent shipment by time_ordered

      2. if shipment.store_id not in RECENT_STORES:

      3. append store.name and shipment.time_ordered to RECENT_STORES at index x where shipment.store_id == store.id

      4. else: get next most recent shipment by time_ordered and repeat the same checks






      python python-2.7 sqlalchemy




      python python-2.7 sqlalchemy






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 15 at 1:55









      Keyadun

      318




      318





























          active

          oldest

          votes











          Your Answer






          StackExchange.ifUsing("editor", function () {
          StackExchange.using("externalEditor", function () {
          StackExchange.using("snippets", function () {
          StackExchange.snippets.init();
          });
          });
          }, "code-snippets");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "1"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53311340%2fusing-sql-alchemy-in-python-to-obtain-x-most-recent-items%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown






























          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Stack Overflow!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid …



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.





          Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


          Please pay close attention to the following guidance:


          • Please be sure to answer the question. Provide details and share your research!

          But avoid …



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53311340%2fusing-sql-alchemy-in-python-to-obtain-x-most-recent-items%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          -

          Popular posts from this blog

          How to change which sound is reproduced for terminal bell?

          Image
          3 Recently upgrade to 18.10 from 18.04, and using the terminal is becoming annoying: the new alert sound is a drip ( /usr/share/sounds/gnome/default/alerts/drip.ogg ), and the previous one is still located at ( /usr/share/sounds/ubuntu/stereo/bell.ogg ). My issue is that at the gnome-terminal, when autocompleting or pressing left BOTH sounds are reproduced, at the same time. I want to just have ubuntu/stereo/bell.ogg active, not both . At the moment I have been only able to reduce the volume of the alerts (but still both are played), or turn the alerts down (but I dislike both "solutions"). gnome-terminal 18.10 teminal-bell share | improve this question
          Read more

          Title Spacing in Bjornstrup Chapter, Removing Chapter Number From Contents

          Image
          up vote 5 down vote favorite 2 I would like to make it so that the vertical space below the title of each chapter is the same when using the Bjornstrup package (i.e. so that the descenders do not affect the spacing - as shown by the red arrow in the picture below). I think I'm fairly happy with the spacing around "A chapter", so I'd really like titles without descenders (e.g. "Contents") to have the same vertical spacing as "A chapter" below the title. I would also like to remove the large "0" in the contents title. Any help appreciated, as always. documentclass[11pt,a4paper]{book} % Packages[![enter image description here][1]][1] usepackage[left=3.5cm, right=3.5cm, top=4.3cm, bottom=4.25cm]{geometry} usepackage[utf8]{inputenc} usepackage{libertine} usepackage[libertine]{newtx
          Read more

          Can I use Tabulator js library in my java Spring + Thymeleaf project?

          Image
          0 I want to add Tabulator js to my java project. I added tabulator.min.js, tabulator.min.css to resources folder. After that added to my html page these dependencies as recommending in readme.md. <link rel="stylesheet" th:href="@{/css/tabulator.min.css}"> <script type="text/javascript" th:src="@{/js/tabulator.min.js}"></script> Now my tables view all elements, that I have in the html page, but not correct. In the documentation of Tabulator is example how to create header and table, var table = new Tabulator("#example-table", { columns:[ {title:"Name", field:"name", sorter:"string", width:200, editor:true}, {title:"Age", field:"age", sorter:"
          Read more