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Struggling with applying initial filter and BeforeSearch Event handler filters

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  • Struggling with applying initial filter and BeforeSearch Event handler filters

    I have a grid with an initial filter that fires on the "OnGridExecute" event that I use to set filters based on a variable cUserType. If cUserType is "Rebator" then the following filter is set:

    e.tmpl.filter_initial = "p.EstSTADate < {" + DATE_FORMAT(ADDMONTHS(DATE(),6),"yyyy/MM/dd")+"} AND (p.ProjectTerminatedDate > {" +DATE_FORMAT(ADDMONTHS(DATE(),-13),"yyyy/MM/dd") +"} OR p.ProjectTerminatedDate IS NULL)
    This code works as intended and shows only projects that have an Estimated Start Date less than 6 month ago into the future or a termination date greater than 13 months ago. If there is no termination date then the project is still active and we want to display those.

    This works fine, but I'm trying to find a way to mimic this in the "BeforeSearch" event handler, but the only thing I see are the "SearchDataSubmitted" properties which don't allow me to submit compound values so I can do something like:

    SearchDataSubmitted.FROM.PROJECTTERMINATEDDATE = ShowProjectsXMonthsOut(-13, SearchDataSubmitted.FROM.PROJECTTERMINATEDDATE)
    This only shows terminated dates greater than 13 months ago but now I can't add "OR IS NULL" to this property so I"m only returning the terminated projects.

    There are also a number of Args.rtc properties like "sql_where" and "sql_final" but altering these has no effect.

    I also tried copying the exact line from "OnGridExecute" event into the "BeforeSearch" event but it does nothing in the "BeforeSearch" event handler.

    I'm wondering if there is a way to do what I want in xbasic with what Alpha passes back to the server or if I should just base the entire grid on stored procedures to get the filters I need.

  • #2
    Re: Struggling with applying initial filter and BeforeSearch Event handler filters

    Nevermind figured it out. To set a filter that stays the same for the whole grid just set this variable:


    So for my example

    e.tmpl.base_filter = "p.EstSTADate < {" + DATE_FORMAT(ADDMONTHS(DATE(),6),"yyyy/MM/dd")+"} AND (p.ProjectTerminatedDate > {" +DATE_FORMAT(ADDMONTHS(DATE(),-13),"yyyy/MM/dd") +"} OR p.ProjectTerminatedDate IS NULL)


    • #3
      Re: Struggling with applying initial filter and BeforeSearch Event handler filters

      Thanks for the post, I will have to take another look at how I setup the initial search in some of my grids and see about setting them server side like you are doing. Although, I think putting the filter in onGridExecute won't work very well for me and I would need to override the filter from the calling component. Either I could override it the "Override" section of the ActionJavascript or I might have to convert A-JS to inline javascript.

      In my case the initial filter is a little more complicated because the user can override it after the grid is displayed. I've been using the first method shown in video # 79:

      But I don't like that method because the system first displays all the records and then it redisplays just the ones matching the initial filter!


      • #4
        Re: Struggling with applying initial filter and BeforeSearch Event handler filters

        Hi Rich,

        I agree that, based on what you have stated, it would make more sense setting the initial filter server side. In that video you posted the grid loads very quickly but I know there would be a noticeable delay on my web server when executing an extra callback when instead you could have just sent the filtered data to begin with!

        I would set e.tmpl.initial_filter in the server's OnGridExecute event handler, since this only applies the very first time the grid is executed, and when a user submits a search it will clear this filter. the only other thing you would need to do is let the user know there is an initial filter set. This would most likely be inline javascript like you stated. There is a flag in the OnGridExecute handler, e.ajaxCallback that is set to .t. on the initial load and .f. on subsequent reloads, you could enter your JS in an if else code block based on whether or not that flag is set. The description of e.ajaxCallback is in the default function definition.


        • #5
          Re: Struggling with applying initial filter and BeforeSearch Event handler filters

          Be sure to use e.tmpl.filter_inital not e.tmpl.initial_filter.