我正在使用PouchDB
websql
适配器或cordova应用程序(我正在使用sqlite插件)。
N.B。这个数据库是完全本地的,我不需要它同步。
对于我的特定应用程序(数据库用于跟踪API调用),我可以多次更新同一文档。
我删除文档并压缩数据库后,我的数据库仍在增长。
我在删除文档后尝试过压缩,并且尽管它有所不同 - 仍然保存了修订版本的记录 - 所以我的数据库仍然无限增长。
如何阻止数据库无限增长?
删除(通过设置doc._deleted = true
然后设置db.put(doc)
)并且压缩似乎不起作用。
请参阅下面的一条记录,即使我删除它并压缩数据库,它仍会随着所有修订而继续增长:
{
"id": "STATUS_TYPE_WEB_BROADCAST_RESULT_APICALL_5",
"deleted": true,
"rev_tree": [
{
"pos": 1,
"ids": [
"561567a6abccf9e25063be1cff906862",
{
"status": "missing"
},
[
[
"76a29a5ea586f54b86d9f7671fa0938a",
{
"status": "missing"
},
[
[
"00945a90f36790a6e25c3c8c99ecb008",
{
"status": "missing",
"deleted": true
},
[
[
"1844208b140a98fe83ccf547f3da1516",
{
"status": "missing"
},
[
[
"dd56c4b8dfae01cf3eabfad3ea21bf84",
{
"status": "missing"
},
[
[
"9152aac8de2c87c2265cc34ef1e992a9",
{
"status": "missing",
"deleted": true
},
[
[
"6ac6a3e5593250b2f6f3b9de5f2b80d0",
{
"status": "missing"
},
[
[
"1c400fcbabe3fe9ee6b923e99ab87b3e",
{
"status": "missing"
},
[
[
"6d3b88e73b6f880152f4e0418ab3a67d",
{
"status": "missing",
"deleted": true
},
[
[
"b2af3344fd9888653777e24bfd15dae4",
{
"status": "missing"
},
[
[
"d70cd32d571868ee2a49b14eb9ff3cf1",
{
"status": "missing"
},
[
[
"3ece08f0894f93859915812aba9d294b",
{
"status": "missing",
"deleted": true
},
[
[
"7f31761497f509e6e5b0815b659405dd",
{
"status": "missing"
},
[
[
"c3db1ae3c411389ac9e099c5739420af",
{
"status": "missing"
},
[
[
"a0c86c197187b210a4030742da03416c",
{
"status": "missing",
"deleted": true
},
[
[
"d89180025074fc48c28fbc785e034218",
{
"status": "missing"
},
[
[
"00eb69a55afea63ac30b9fa9038e3f1e",
{
"status": "missing"
},
[
[
"b8c051e94c65e485b2129464b0b4830b",
{
"status": "missing",
"deleted": true
},
[
[
"2832699d4da2bec534a129ade793bcb8",
{
"status": "missing"
},
[
[
"f8314cb28d7d7466b7e15ff7756f703a",
{
"status": "missing"
},
[
[
"398e27cf400f815c04eb5059900949d8",
{
"status": "missing",
"deleted": true
},
[
[
"747af489d66690927251e71ad4608500",
{
"status": "missing"
},
[
[
"4f2766536562894054c6220ef84fb782",
{
"status": "missing"
},
[
[
"536677ee9decf93b77d2d4b2a4243936",
{
"status": "missing",
"deleted": true
},
[
[
"82d9b89e3ac956f5bc64d27a32ba3d5b",
{
"status": "missing"
},
[
[
"23fe3cfd7bce5a6e0d279c708dc3565c",
{
"status": "missing"
},
[
[
"3c7f3d5b774f0549ca3c80700e84e074",
{
"status": "missing",
"deleted": true
},
[
[
"5b0db6e212bbf58e4d162389dc67800b",
{
"status": "missing"
},
[
[
"94b5b06de69d7b02bfa0800a4a895113",
{
"status": "missing"
},
[
[
"bb35cf47fa3da85eb2941c667c7ab40e",
{
"status": "missing",
"deleted": true
},
[
[
"432ea39039c355f9b1512c40b237ec38",
{
"status": "missing"
},
[
[
"f09f2f15dde4bd327f20c1beabc2ae13",
{
"status": "missing"
},
[
[
"b4a21b8562c085e0a2a91ca9ba5e6385",
{
"status": "available",
"deleted": true
},
[]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
]
}
],
"seq": 230
}
答案 0 :(得分:10)
我通过在pouchDb的github link to github issue上打开一个问题得到了答案。
以下是github上@daleyharvey的答案。正如您所看到的,主要的是在我的初始化中添加revs_limit: 1
。这阻止了我的数据库不受限制地增长。
新PouchDB('name', {revs_limit: 1, auto_compaction: true})
应该做你想做的事,revs_limit
是我们跟踪的修订数量(这是你看到的)压缩删除这些修订的内容
就像我的用例一样,我最终发现在最终端不需要使用PouchDB等高级数据库 - 我需要普通的WebSQL或本地存储。
答案 1 :(得分:1)
您是否尝试过自动压缩?
var db = new PouchDB('mydb', {auto_compaction: true});
db.put({_id: 'foo', version: 1}).then(function () {
return db.get('foo');
}).then(function (doc) {
doc.version = 2;
return db.put(doc);
}).then(function () {
// Revision 1 is already unavailable!
}).catch(function (err) {
// handle errors
});