mysql - Best way to check deleted item when doing data synchronization? -


i have system periodically calls api fetch list of attendees event, , store/synchronize attendees in local rdb.

each record has timestamp field can use check updated/new records.

however don't have elegant solution checking deleted records. matching each record id against local db viable way of finding items deleted?

if api returns entire list, start way:

  1. put list table, say, list.
  2. see new via from list left join local using(name) local.name null. (it unclear how timestamp factors in.)
  3. to see deleted, swap table names.

Comments

Post a Comment

Popular posts from this blog

javascript - Confirm a form & display message if form is valid with JQuery -

i'm developing django application , use javascript in order improve website. i have form , display 2 things : confirm form before submit if form submitted, display message : 'form saved' it's first time i'm using js , need make process. this code : <form class = "form" method='post' action=''> {% csrf_token %} <br></br> {{ form.as_p}} <br></br> <button type="submit">valider</button> </form> <script> $('#form').submit(function() { var c = confirm("click ok continue?"); return c; //you can return c because true or false }); </script> and if form valid , saved : <script type="text/javascript" > $(document).on('valider', 'form.form', function(form) { var $form = $(form); $.ajax({ ...
Read more

Retrieving ETA (estimated time of arrival) with Google Distance Matrix API and public transit as transport mode -

Image
is possible retrieve eta google's distancematrix api (or alternative api). fyi, eta different duration, when using public transport. following example clarify request. when leave on friday @ 8.15 i'll able catch train @ 8.30 , arrive @ 9.00 am. google says duration 30 minutes. however, when leave on saturday @ 8.15 i'll able catch first train @ 9.00 , arrive @ 9.30 am. google still says duration 30 minutes, means ignore delay. google map supports functionality there api around giving me eta instead of duration. can see, distance-matrix' response no good. clarifying question little. eta estimated time of arrival , it's clear user wants know entire duration of transport (including waiting time public transport).
Read more

ionic framework - Meteor - Error: Failed to execute 'insertBefore' on 'Node' -

i trying make dynamic list display using meteor, idea load more elements each time bottom of page reached. the html template following : <template name="contacts"> {{#contentfor "headertitle"}} <div class="bar bar-header bar-assertive"> <h1 class="title">contacts :</h1> </div> {{/contentfor}} {{#ionview}} {{#ioncontent}} <div class="list"> {{#each contacts}} <a class="item item-avatar" href="/contacts/{{_id}}"> <img src="/img/ico_client.png"> <h2>{{full_name}}</h2> <p>{{company}}</p> </a> {{/each}} </div> {{#if moreresults}} <div id="showmoreresults" style="margin-left: 25px;"> <span class="loading">loading...</span> </div> {{/if}} {{/ioncontent}} {{/ionview}} </te...
Read more