以下查询应返回所有用户区域为德国的文档，并应在用户ID字段上进行排序。但是，排序无法正常进行。它应该以用户ID 2开头，但是以10和2开头在中间。
用户区域的映射类型是关键字，用户ID是关键字（用户ID可以是一个字符串，为简便起见，此处仅使用整数）。
任何人都可以指出查询出了什么问题。
查询：
{
"size" : 10,
"query": {
"constant_score" : {
"filter" : {
"term" : { "user-region" : "germany"}
}
}
},
"sort": [
{
"user-id": {
"order": "asc"
}
}
]
}
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 20,
"max_score": null,
"hits": [
{
"_index": "user",
"_type": "_doc",
"_id": "10",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "10",
"user-region": "germany",
"version": "1.0"
},
"sort": [
"10"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "12",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "12",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"12"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "14",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "14",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"14"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "16",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "16",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"16"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "18",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "18",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"18"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "2",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "2",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"2"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "20",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "20",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"20"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "22",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "22",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"22"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "24",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "24",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"24"
]
},
{
"_index": "user",
"_type": "_doc",
"_id": "26",
"_score": null,
"_source": {
"is-admin": false,
"docType": ":cm:user",
"user-id": "26",
"oem-id": "germany",
"version": "1.0"
},
"sort": [
"26"
]
}
]
}
}