MongoDB在聚合查询中使用$ text [英] Mongodb using $text in aggregate query
问题描述
我正在尝试使用聚合搜索文本,我有以下代码.这是我的聚合查询,但不起作用.我希望先搜索文本,然后查找其中带有该词的帖子以找到用户,然后再按user.name和主题进行查询.
I'm trying to search in text with aggregate and I have the following code.Here is my aggregate query, but doesn't work. I expect to search first for the text and if find posts with that words in it to find user and then to query by user.name and the topic.
const posts = await Post.aggregate([
{
$match: {
$text: {
$search: postWords ? `${postWords}` : /.*/,
$caseSensitive: false,
},
},
},
{
$lookup: {
from: "users",
localField: "user",
foreignField: "_id",
as: "user",
},
},
{
$unwind: "$user",
},
{
$match: {
$and: [
{
topic: {
$regex: postTopic ? postTopic : /.*/,
$options: "i",
$exists: true,
},
},
{
"user.name": {
$regex: postName ? postName : /.*/,
$options: "i",
$exists: true,
},
},
{ text: { $regex: postWords ? postWords : /.*/, $options: "i" } },
],
},
},
{
$skip: req.params.page ? (req.params.page - 1) * 10 : 0,
},
{
$limit: 11,
},
{
$project: {
"user.password": 0,
"user.active": 0,
"user.email": 0,
"user.temporaryToken": 0,
},
},
]);
推荐答案
您可以从 match 查询中删除对象"text" ,然后将在匹配查询中直接输入$ text运算符,如下所示:
You can remove the object "text" from the match query and put the $text operator straight away within the match query as follows:
db.notifications.aggregate([
{
$match: {
$text: {
$search: "faizul"
}
}
}
])
在执行上述操作之前,请确保已为要文本搜索的字段设置了索引类型作为文本.
Before executing the above make sure that you had made the index type as text for the field that you want to text search for.
就我而言,我已将 agent_id 字段标记为 文本IndexType .
In my case I had marked agent_id field as text IndexType.
查询结果: 从查询中可以看到,我只是在文本搜索中输入了faizul,而不是完整的电子邮件地址.效果很好.
Query Result: From the query you could see that I had simply entered faizul in the text search and not the full email address. Which works fine.
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