Android Cloudant 同步查询

Question

正如文档所说（https://github.com/cloudant/sync-android/blob/master/doc/query.md）我正在尝试在列表中进行查询

看：

query.put("codigo", 4);
            result = q.find(query);
            for (DocumentRevision revision : result) {
                Log.d("QueryTest", "Test1 :" + revision.getBody().toString());
            }

return:

{ "codigo":4, "companies":[
{
"id":"b9f19d88-13c0-40e3-89de-63dc787afb4c", "name":"Filial 0 1488949817178" }, {
"id":"f17fb098-316e-4d33-a0f7-f5719bf9d62e", "name":"Filial 1 1488949817178" } ], "employees":[
{
"codigo":2891, "id":"cc54fa37-0b64-4108-869a-1303c6176ce5", "name":"Employee 0 79ed4" }, {
"codigo":4642, "id":"19b76bbc-82c7-4295-a385-82ac2d892458", "name":"Employee 1 e1102" } ], "id":"ef2d0ebf-50b9-4cd0-9aaf-5389bccaaa56", "nome":"Random 4" }

所以没问题

但是这个查询不起作用：

query.put("employees.codigo",  2891);

先return:

QuerySqlTranslator: No single index contains all of [{employees.codigo={$eq=2891}}]; add index for these fields to query efficiently

创建索引后：

Index i = q.createJsonIndex(Arrays.<FieldSort>asList(new FieldSort("employees.codigo")), null);

return

QueryExecutor: Projection fields array is empty, disabling project for this query

所以我创建了要过滤的字段数组列表

List<String> fields = Arrays.asList("codigo");
result = q.find(query, 0 , 0 , fields, null);

nothing returned

添加更多一个字段来过滤：

    query.put("codigo",4)
query.put("employees.codigo",  2891);

returned: Complain about index

创建了另一个索引：

    i = q.createJsonIndex(Arrays.<FieldSort>asList(new FieldSort("employees.codigo"), new FieldSort("codigo")), null);

returned: Nothing

怎么了？

如何通过 child 获取文档以及如何仅获取 children？

谢谢

Answer 1

我认为这是不受支持的，参见the doc on unsupported features，特别是突出显示的条目：

Arrays

Dotted notation to index or query sub-documents in arrays.

Querying for exact array match, { field: [ 1, 3, 7 ] }.

Querying to match a specific array element using dotted notation, { field.0: 1 }.

Querying using $all.

Querying using $elemMatch.

Android Cloudant 同步查询

Android Cloudant sync query

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