Question

我正在尝试动态创建和加入sql查询，具体取决于哪些搜索过滤器已添加到搜索容器中。使用一个过滤器正常工作，但添加两个过滤器时，一个查询中的占位符（_ORGAN_）不会被该过滤器元素值的值替换。

我应该如何更改search_btn函数中的代码才能使其生效？

sql = [];
query = "SELECT * FROM specimen";
$('#system').change(function () {
    obj1 = {};
    obj1.filter = " topography_index = '_ORGAN_'";
    if ($(this).is(':checked')) {
        $('#system_menu_wrapper').prependTo('#search_container');
        sql.push(obj1);
    }
});

$('#keyword').change(function () {
    obj2 = {};
    obj2.filter = " MATCH(clinical_history) AGAINST ('_KEYWORD_' IN BOOLEAN MODE) OR MATCH(specimen) AGAINST ('_KEYWORD_' IN BOOLEAN MODE) OR MATCH(macroscopic) AGAINST ('_KEYWORD_' IN BOOLEAN MODE) OR MATCH(microscopic) AGAINST ('_KEYWORD_' IN BOOLEAN MODE) OR MATCH(conclusion) AGAINST ('_KEYWORD_' IN BOOLEAN MODE) OR MATCH(comment) AGAINST ('_KEYWORD_' IN BOOLEAN MODE)";
    if ($(this).is(':checked')) {
        $('#keyword_field_wrapper').prependTo('#search_container');
        sql.push(obj2);
    }
});

$('#search_container').on('click', '#search_btn', function () {
    if ($("#search_container").find('#system_menu_wrapper').length) {
        var regExp1 = new RegExp('_ORGAN_', 'g');
        $.each(sql, function (index, value) {
            // store the replacement string as the .replaced property
            // so the .filter property remains unchanged and can be used
            // again in the future
            sql[index].replaced = sql[index].filter.replace(regExp1, 'T' + $('#organ_menu').val());
        });
    };

    if ($("#search_container").find('#keyword_field_wrapper').length) {
        var regExp2 = new RegExp('_KEYWORD_', 'g');
        $.each(sql, function (index, value) {
            // store the replacement string as the .replaced property
            // so the .filter property remains unchanged and can be used
            // again in the future
            sql[index].replaced = sql[index].filter.replace(regExp2, $('#keyword_field').val());
        });
    }

    if (sql.length) {
        var q = $.map(sql, function (elem) {
            return elem.replaced;
        });
        query += " WHERE " + q.join('  AND ');
    }

    $.ajax({
        type: "POST",
        url: 'scripts/do_search.php',
        data: {
            query: query,
        },
        success: function (data) {
            $('#search_results').html(data);
            $('#search_results').show();
            query = "SELECT * FROM specimen";
        }
    });
});

http://jsfiddle.net/8hqS9/1/

Answer 1

将第二个字段的处理更改为：

if ($("#search_container").find('#keyword_field_wrapper').length) {
    var regExp2 = new RegExp('_KEYWORD_', 'g');
    var replacement = $('#keyword_field').val();
    $.each(sql, function (index, value) {
        // store the replacement string as the .replaced property
        // so the .filter property remains unchanged and can be used
        // again in the future
        value.replaced = (value.replaced || value.filter).replace(regExp2, replacement);
    });
}

如果它存在，则使用replaced属性作为输入，否则使用filter属性，以便它构建在第一个循环的替换上。

另外，请注意，您可以使用迭代函数的value参数，而不是每次都必须访问sql[index]。由于$('#keyword_field').val()在循环期间不会发生变化，因此应将其缓存在循环外的变量中。

加入sql查询 - 第二个查询中缺少占位符值

1 个答案: