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嗨，我有一个小的 javascript 函数，可以动态过滤我的表单：

// set up a new XMLHttpRequest variable
var request = false;
try {
    request = new XMLHttpRequest();
} catch (trymicrosoft) {
    try {
        request = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (othermicrosoft) {
        try {
            request = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (failed) {
            request = false;
        }
    }
}

// if no request then throw up an alert window
if (!request)
    alert("Error initializing XMLHttpRequest!");

// this function takes the island group value and sends it to the url as a get variable
function getIslandName(lang) {
    var islandGroup = document.getElementById("id_island_group").value;

    if (islandGroup == '') {
        // if Not Specified re-selected then set data to null and bypass updatePage()
        var data = null; 
        update_select($('select[name=island_name]'), data);
    } 
    else {
        var url = "../collections/find_island?island_group=" + escape(islandGroup);
        // alert("Ready state is: " + request.readyState);
        // alert("url: " + url);
        request.open("GET", url, true);
        request.onreadystatechange = updatePage;
        request.send(null);
    }    
} 

// what to do when http ready state changes
function updatePage() { 
    if (request.readyState == 4) {
        if (request.status == 200) {

            // get response array
            var data = JSON.parse(request.responseText); 
            update_select($('select[name=island_name]'), data);
        }  
        // some error checking
        else if (request.status == 404) {
            alert("Request url does not exist");
        }
        else {
            alert("Error: status code is " + request.status);
        }
    }
}   

function update_select(select, data) {
    // find and remove existing options
    select.find('option').remove();

    var optionText = document.getElementById("lang").innerHTML

    select.append($('<option value>' + optionText + '</option>'));
    // loop through results and append to select as options
    for (var k in data) {
        select.append($('<option value="'+data[k]+'">'+data[k]+'</option>'));
    }
}

我的表格：

class SearchForm(forms.Form):
    ...
    island_group = forms.ModelChoiceField(
        required=False,
        label=ugettext_lazy('Island Group'), 
        initial=None,
        queryset=Localityonline.objects.values_list('islandgroup', flat=True).distinct('islandgroup').exclude(islandgroup=None).order_by('islandgroup'), 
        empty_label=ugettext_lazy("Not Specified"), 
        widget=forms.Select(attrs={"class":'searchfield', "onChange":'getIslandName()'})
    )
    island_name = forms.ChoiceField(
        required=False,
        label=ugettext_lazy('Island Name'), 
        initial=None,
        choices=DEFAULT_CHOICES,
        #queryset = Localitymayor.objects.values_list('islandname', flat=True).distinct('islandname').exclude(islandname="n/a").order_by('islandname'), 
        #empty_label=ugettext_lazy("Not Specified"),
    )
    ...

问题是，如果值islandGroup类似于“Española”（即拉丁字符），我会收到状态 500 错误和以下 Django 错误：

OperationalError: (1267, "Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='")


<WSGIRequest
path:/datazone/collections/find_island/,
GET:<QueryDict: {u'island_group': [u'Espa\ufffd']}>,
POST:<QueryDict: {}>,
COOKIES:{'__utma': '173650102.812455619.1337018914.1337629222.1337641044.38',
 '__utmb': '173650102.4.10.1337641044',
 '__utmc': '173650102',
 '__utmz': '173650102.1337613083.36.2.utmcsr=darwinfoundation.org|utmccn=(referral)|utmcmd=referral|utmcct=/datazone/galapagos-research/search/',
 'csrftoken': '7cac07481c8ff5762fac33bf0b3590da',
 'sessionid': '4becce44a950091a3cf7d306633427b4'},
META:{'CSRF_COOKIE': '7cac07481c8ff5762fac33bf0b3590da',
 'DOCUMENT_ROOT': '/home/darwinfo/public_html',
 'GATEWAY_INTERFACE': 'CGI/1.1',
 'HTTP_ACCEPT': '*/*',
 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
 'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch',
 'HTTP_ACCEPT_LANGUAGE': 'en-US,en;q=0.8',
 'HTTP_CONNECTION': 'close',
 'HTTP_COOKIE': 'csrftoken=c297f86b353937f52abc36af8b4d595a; csrftoken=7cac07481c8ff5762fac33bf0b3590da; sessionid=4becce44a950091a3cf7d306633427b4; __utma=173650102.812455619.1337018914.1337629222.1337641044.38; __utmb=173650102.4.10.1337641044; __utmc=173650102; __utmz=173650102.1337613083.36.2.utmcsr=darwinfoundation.org|utmccn=
     ...
 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19',
 'PATH': '/sbin:/usr/sbin:/bin:/usr/bin',
 'PATH_INFO': u'/collections/find_island/',
 'PATH_TRANSLATED': '/home/darwinfo/public_html/collections/find_island/',
 'QUERY_STRING': 'island_group=Espa%F1ola',
 'REDIRECT_QUERY_STRING': 'island_group=Espa%F1ola',
 'REDIRECT_STATUS': '200',
 'REDIRECT_UNIQUE_ID': 'T7rLMjIWL2YAAGS3N@sAAAET',
 'REDIRECT_URL': '/datazone/collections/find_island/',
 'REMOTE_ADDR': '157.100.37.112',
 'REMOTE_PORT': '35245',
 'REQUEST_METHOD': 'GET',
 'REQUEST_URI': '/datazone/collections/find_island/?island_group=Espa%F1ola',
 'SCRIPT_FILENAME': '/home/darwinfo/public_html/datazone/django.fcgi',
 'SCRIPT_NAME': u'/datazone',
 'SERVER_ADDR': '50.22.47.102',
 'SERVER_PORT': '80',
 'SERVER_PROTOCOL': 'HTTP/1.1',,
 'SERVER_SOFTWARE': 'Apache',
 'UNIQUE_ID': 'T7rLMjIWL2YAAGS3N@sAAAET',
 'wsgi.errors': <flup.server.fcgi_base.OutputStream object at 0x1707ab90>,
 'wsgi.input': <flup.server.fcgi_base.InputStream object at 0x16f2fad0>,
 'wsgi.multiprocess': False,
 'wsgi.multithread': True,
 'wsgi.run_once': False,
 'wsgi.url_scheme': 'http',
 'wsgi.version': (1, 0)}>

任何帮助将非常感激。

4

1 回答 1

0

检查每个表的排序规则类型，并确保它们具有相同的排序规则。

之后，还要检查您在操作中使用的每个表字段的排序规则类型。

我遇到了同样的错误，并且这个技巧有效。

于 2012-05-22T03:03:19.510 回答