我正在尝试将 JQUERY 与 Coldfusion 结合使用。我想从 cfc 文件中的函数以 JSON 格式从数据库检索结果。我需要使用多个查询手动创建 json:
<cfcomponent output="false">
<cffunction name="getTransports" access="remote" returnformat="JSON" output="false">
<cfargument name="CITY_TO" type="string" required="yes">
<cfargument name="CITY_FROM" type="string" required="yes">
<cfquery name ="transport" datasource="#application.datasource#">
<!---Query Transports--->
select * from TRANSPORTS
</cfquery>
<cfset transports = arrayNew(1)>
<cfloop from="1" to="#transport.recordcount#" index="i">
<cfquery name="defined_transport" datasource="#application.datasource#">
select * from TABLE_FRAIS
where CITY_TO = <cfqueryparam cfsqltype="cf_sql_varchar" value="#arguments.CITY_TO#">
and CITY_FROM = <cfqueryparam cfsqltype="cf_sql_varchar" value="#arguments.CITY_FROM#">
and CTRP_ST_CODE = '#transport.TRANSPORT_CODE#'
</cfquery>
<cfif defined_transport.recordCount eq 0>
<cfset transport_value = "#transport.TRANSPORT_NAME# (not defined)">
<cfelse>
<cfset transport_value = "#transport.TRANSPORT_NAME#">
</cfif>
<cfset transpVO = structNew() />
<cfset transpVO['ID']= #transport.TRANSPORT_CODE# />
<cfset transpVO['VALUE']= #transport_value# />
<cfset transports[i] = transpVO />
</cfloop>
<cfreturn transports>
</cffunction>
</cfcomponent>
当我在 JQUERY 脚本中检索结果时,我获得了一个字符串 JSON:
[ { "ID" : "APEX",
"VALUE" : "Apex (not defined)"
},
{ "ID" : "AVI",
"VALUE" : "Plane (not defined)"
},
{ "ID" : "TRAIN 1",
"VALUE" : "Train 1st class"
},
{ "ID" : "VOIT",
"VALUE" : "Car"
},
{ "ID" : "ZERO",
"VALUE" : "Cost 0 (not defined)"
}
]
编辑:
这是我的 JQUERY 脚本,用于通过 Coldfusion 检索数据:
$().ready(function() {
$.ajax({
type: 'GET',
url: 'transports.cfc',
data: {
method: 'getTransports',
CITY_TO: 'LUX',
CITY_FROM: 'UWP'
},
dataType: "application/json", //this is important responsetype:'JSON',
success: function(result) {
var select = $("##transp");
select.empty();
select.append(
new Option('Select transport', '-1')
);
console.log(result); // display the JSON
console.log(result.length); // displays 252
},
error: function(xhr, message) {
alert('ajax request failed');
console.log(xhr, message);
}
});
});
结果显示在控制台中,如果我不知道如何填充下拉列表,可能会这样。我尝试添加:
select.append(
new Option(item.ID, item.VALUE)
);
我在下拉列表中获得了 252 行,没有文本。
但是我试图用它来填充下拉列表,但我做不到。
您能告诉我我的 Coldfusion 函数和 JSON 结果是否正常吗?
问候,
最佳答案
问题似乎出在您的脚本上。您应该尝试使用循环一次添加一个选项:
var select = $("#transp");
select.empty();
select.append(
new Option('Select transport', '-1')
);
for(var i=0; i<result.length; i++){
select.append(
new Option(result[i].ID, result[i].VALUE)
);
}
这是一个工作片段:http://jsfiddle.net/odp3dve8/1/
//oResult simulates the AJAX result :
var oResult = [ { "ID" : "APEX",
"VALUE" : "Apex (not defined)"
},
{ "ID" : "AVI",
"VALUE" : "Plane (not defined)"
},
{ "ID" : "TRAIN 1",
"VALUE" : "Train 1st class"
},
{ "ID" : "VOIT",
"VALUE" : "Car"
},
{ "ID" : "ZERO",
"VALUE" : "Cost 0 (not defined)"
}
];
var select = $("#transp");
select.empty();
select.append(
new Option('Select transport', '-1')
);
//Loop on each element of the JSON result and add each option.
for(var i=0; i<oResult.length; i++){
select.append(
new Option(oResult[i].ID, oResult[i].VALUE)
);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<select id="transp">
<option value="1">Fake option 1</option>
<option value="2">Fake option 2</option>
</select>
编辑。 对于 string/json 问题,您可以尝试更新请求参数“headers”和“datatype”:
$.ajax({
type: 'GET',
url: 'transports.cfc',
data: { ... },
headers: {'Accept': "application/json"},
dataType: "json",
success: function(result) { ... }
error: function(result) { ... }
});
如果这不起作用,您可能会对这篇文章感兴趣: http://blog.tcs.de/coldfusion-query-to-javascript-object/
关于jquery - JQUERY 的 cfc 文件中的 JSON 结果出现错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32647809/