Question

我正在使用基本的$ .get（）脚本来检索数据库中是否已存在记录。调用的页面返回yes或no，具体取决于是否找到记录。现在，无论如何，它都会返回一个空白值。

这是带有特定输入字段的HTML片段

<p><label for="participant_id">Please enter the Participant ID:</label>
    <cfinput type="text" name="participant_id" value="#attributes.stPages.Content.ParticipantId#" required="yes" message="Enter the Participant ID" />
    <cfif Len(trim(attributes.stPages.Content.ParticipantId)) eq 0>
        <cfinput type="button" name="checkunique" value="Check if Unique" />
        <cfinput type="hidden" name="participant_id_valid" value="false" />
    </cfif></p>

这是调用脚本

$("#checkunique").click(function() {
    $.get('participant_id_check.cfm?participant_id=' + $('#participant_id').val(), function(data) {
        result = data.replace(/^\s+|\s+$/g,"");
        if (result) {
            $('#unique-result').text('Your Participant ID is accepted');
        } else {
            $('#unique-result').text('Your Participant ID has already been used.  Please enter another');
        }
    });
});

这是调用页面。如果我直接在URL中调用它，它可以正常工作。

<!--- Check the database to ensure that the participant ID entered doesn't already exist (only for new entries). --->
<cfparam name="url.participant_id" default="" type="string" />

    <cfquery name="checkID" datasource="#APPLICATION.strConfig.datasource#">
        SELECT sessionid
        FROM tblsessions
        WHERE participant_id = <cfqueryparam cfsqltype="cf_sql_varchar" value="#url.participant_id#" null="no" />
    </cfquery>

    <!--- No record found; value is unique --->
    <cfif Not checkID.RecordCount>
        Yes 
    <cfelse>
        No <!--- Record found; value is not unique--->
    </cfif>

Answer 1

您未正确使用$.get，请尝试以下操作：

$("#checkunique").click(function() {
    $.get('participant_id_check.cfm',
          {'participant_id': $('#participant_id').val()}, function(data) {
        result = data.replace(/^\s+|\s+$/g,"");
        if (result) {
            $('#unique-result').text('Your Participant ID is accepted');
        } else {
            $('#unique-result').text('Your Participant ID has already been used.  Please enter another');
        }
    });
});

同样是一个侧面点，你对id='participant_id'没有任何意见，所以$('#participant_id').val()可能不会给你任何东西

结果未从$ .get（）中提取

1 个答案: