ColdFusion:尝试在CFScript中查询数据库

Question

我的老板要我使用cfscript而不是标签进行数据库交互.有人知道任何好的教程吗？我购买了Adobe ColdFusion应用程序开发书,第2卷.但它在脚本编写方面没有太多内容.我做谷歌并找到了这个网站,但它没有解释太多.

有没有人知道有关访问CFScript数据库的任何好教程？

基本上我必须将以下内容转换为使用CFScript:

<cfquery name="drafts" datasource="ICEchat">
    SELECT * from Messages where IsTemp=1 and LinkA=#FORM.LinkA# and LinkB=#FORM.LinkA#
</cfquery>
<cfif drafts.recordcount GT '0'>
    <cfquery name="Attachments" datasource="ICEchat">
        SELECT * FROM Attachments where id=2
    </cfquery>
    { Message:"<cfoutput query="drafts">#Message#</cfoutput>", Attachments:[<cfoutput query="attachments">
        "#url#"<cfif attachments.currentRow LT attachments.recordcount>,</cfif>
    </cfoutput>]}
<cfelse>
    <cfquery name="addrecord" datasource="ICEchat">
        INSERT INTO Messages 
        VALUES(1,1,' ',1)
    </cfquery>
    { Message:"NA", Attachments:[]}
</cfif>

Answer 1

来自谷歌的第4个链接 "cfscript查询教程":

<CFSCRIPT>
    myQry = new Query(); // new query object     
    myQry.setSQL("select bookid, title, genre from app.books where bookid = :bookid"); //set query
    myQry.addParam(name="bookid",value="5",CFSQLTYPE="CF_SQL_INTEGER"); // add query param
    qryRes = myQry.execute(); // execute query
    writedump(qryRes.getResult().recordcount, true); // get resultcount
    writedump(qryRes.getResult(), false); // dump result
    writeoutput('<BR>');
</CFSCRIPT>

那应该告诉你需要知道的一切.

此外,你真的不应该手动创建JSON,无论它多么简单.使用serializeJson().

Answer 2

没有测试过这个,但是应该这样做.

<cfscript>
   local.drafts = new Query();
   local.drafts.setDatasource("ICEchat");
   local.drafts.addParam(name="linkA", value="#form.linkA#", cfsqltype="CF_SQL_VARCHAR");
   local.drafts.addParam(name="linkB", value="#form.linkB#", cfsqltype="CF_SQL_VARCHAR");
   local.drafts.setSQL("SELECT * from Messages where IsTemp=1 and LinkA = :linkA and LinkB = :linkA");
   local.drafts.execute().getResult();

   if (local.drafts.recordcount GT 0) {
      local.attachments = new Query();
      local.attachments.setDatasource("ICEchat");
      local.attachments.setSQL("SELECT * FROM Attachments where id=2");
      local.attachments.execute().getResult();
      WriteOutput("{ Message: ");
      for (i=1; i LTE local.drafts.recordcount; i=i+1) {
         WriteOutput(local.drafts.message[i]);
      }
      WriteOutput(", Attachments: ");
      for (i=1; i LTE local.attachments.recordcount; i=i+1) {
         WriteOutput(local.drafts.url[i]);
         if (i LT local.attachments.recordcount) {
            WriteOutput(", ");
         }
      }
      WriteOutput("}");
   } else {
      local.q = new Query();
      local.q.setDatasource("ICEchat");
      local.q.setSQL("INSERT INTO Messages VALUES(1,1,' ',1)");
      local.q.execute();
      WriteOutput("{ Message:"NA", Attachments:[]}");
   }
</cfscript>