我正在尝试将带有ajax的PostgreSQL数据库(字段类型为文本)中的一组文本带入我的网页。我的问题是新行,当数据库中的文本没有换行符时它很有用,但是当我在数据库中的文本中使用新行时,json不会给我存储的数据。
function selectCalendarEvents(user_id, event_datestart, event_datestop, callback) {
var request;
if(window.XMLHttpRequest)
request = new XMLHttpRequest();
else
request = new ActiveXObject("Microsoft.XMLHTTP");
request.onreadystatechange = function() {
if (request.readyState == 4 && request.status == 200) {
if(request.responseText.substr(0, 6) == "error ")
alert(errorName[request.responseText.substr(6)]);
else {
jsonCalendarEvents = $.parseJSON(request.responseText);
selectEvents(user_id, event_datestart, event_datestop, callback);
}
}
}
request.open("GET", "php/calendar.php?action=selectCalendarEvents&user_id=" + user_id + "&event_datestart=" + event_datestart + "&event_datestop=" + event_datestop, true);
request.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
request.send();
}
这是我的javascript函数,它请求数据集
if($action == "selectCalendarEvents") {
$user_id = $_GET["user_id"];
$event_datestart = "'" . $_GET["event_datestart"] . "'";
$event_datestop = "'" . $_GET["event_datestop"] . "'";
require_once("connect.php");
$query = "SELECT event_id, event_name, event_datestart, event_datestop, event_timestart, event_timestop, calendar_events.calendar_group, calendar_color, event_info FROM calendar_events LEFT JOIN calendar_calendars ON calendar_events.calendar_group = calendar_calendars.calendar_group WHERE user_id = " . $user_id . " AND calendar_show = true AND event_datestart <= ". $event_datestop . " AND event_datestop >= " . $event_datestart;
$result = pg_query($connect, $query);
if(!$result)
die("error 1"); // query error
$comma = '';
$json = '{"events":[';
while ($row = pg_fetch_row($result)) {
$json .= $comma . '{';
$json .= '"event_id":"' . $row[0] . '",';
$json .= '"event_name":"' . $row[1] . '",';
$json .= '"event_datestart":"' . $row[2] . '",';
$json .= '"event_datestop":"' . $row[3] . '",';
$json .= '"event_timestart":"' . $row[4] . '",';
$json .= '"event_timestop":"' . $row[5] . '",';
$json .= '"calendar_group":"' . $row[6] . '",';
$json .= '"calendar_color":"' . $row[7] . '",';
$json .= '"event_info":"' . $row[8] . '"';
$json .= '}';
$comma = ',';
}
$json .= ']}';
echo $json;
}
这是我的php,它返回数据集。如果row [8]又名event_info存储带有换行符的文本..当我尝试使用事件填充我的日历时,似乎json不存储任何数据或smt就像那样。
答案 0 :(得分:0)
我发现我应该将\r\n
替换为<br/>
,它会起作用。当我将响应字符串提供给json
replace(/\r\n/g, "<br/>")
jsonCalendarEvents = $.parseJSON(request.responseText.replace(/\r\n/g, "<br/>"));