使用地图遍历对象数组。在javascript中过滤，减少或Object.keys（）
我有一个JSON数组对象，我只想输出它的一些数据，就像一棵树，我尝试过不同的循环，但我想使用map，filter和reduce for是现在更好的遍历数组的方法对象。
我的预期输出就是这样。
注意：由于循环，树中的第二个Project101是错误的，它应该被移除并且树中只有Project101，Project102，Project103。
以下是json文件示例
Caused by: org.hibernate.exception.SQLGrammarException: could not execute query
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.loader.Loader.doList(Loader.java:2235)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129)
at org.hibernate.loader.Loader.list(Loader.java:2124)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:67)
... 126 more
Caused by: org.postgresql.util.PSQLException: ERROR: column "btype" does not exist
Hint: Perhaps you meant to reference the column "aclient0_.type".
Position: 204
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2161)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1890)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:560)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:302)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:353)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1812)
at org.hibernate.loader.Loader.doQuery(Loader.java:697)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.doList(Loader.java:2232)
提前谢谢。
我尝试过的这个很长，因为循环。
var jsonData = [
{
"id": 1,
"project_name": "Project101",
"updated_by": "Chaddilac Change",
"created_date": "2018-01-09T15:49:54Z",
"updated_date": "2018-01-09T15:49:54Z",
"is_deleted": false,
"languages": [
{
"id": 1,
"language": "English",
"created_by": "Sammy Sosa",
"created_date": "2018-01-04T04:45:54Z",
"beta_project": 1,
"details": [
{
"id": 1,
"phase_name": "BetaPhase101",
"created_date": "2018-01-04T04:33:00Z",
"created_by": "John Doe",
"phase_title": "BetaTitle",
"external_url": "www.nba.com",
"segment": "Consumer",
"locale": "English",
"is_published": false,
"beta_start_date": "1975-01-01T00:00:00Z",
"beta_end_date": "1975-01-01T00:00:00Z",
"project_owner": "John Doe",
"project_subtitutes": "Gelly",
"last_update_date": "2018-01-04T04:33:00Z",
"last_updated_by": "John Doe",
"last_published_date": "2018-01-04T04:33:00Z",
"last_published_by": "Neil S",
"accrdn_title_one": "title one",
"accrdn_contents_one": "content one",
"accrdn_title_two": "title two",
"accrdn_contents_two": "content two",
"accrdn_title_three": "title three",
"accrdn_contents_three": "content three",
"accrdn_title_four": "titile four",
"accrdn_contents_four": "content four",
"accrdn_title_five": "title five",
"accrdn_contents_five": "content five",
"accrdn_title_six": "title six",
"accrdn_contents_six": "content six",
"beta_language": 1
},
{
"id": 2,
"phase_name": "BetaPhase102",
"created_date": "2010-10-10T00:00:00Z",
"created_by": "John Doe",
"phase_title": "BetaTitle",
"external_url": "www.nba.com",
"segment": "Consumer",
"locale": "English",
"is_published": false,
"beta_start_date": "2018-01-01T00:00:00Z",
"beta_end_date": "2018-10-20T00:00:00Z",
"project_owner": "John Doe",
"project_subtitutes": "Gelly",
"last_update_date": "2010-10-10T00:00:00Z",
"last_updated_by": "John Doe",
"last_published_date": "2010-10-10T00:00:00Z",
"last_published_by": "TRex",
"accrdn_title_one": "title one",
"accrdn_contents_one": "content one",
"accrdn_title_two": "title two",
"accrdn_contents_two": "content two",
"accrdn_title_three": "title three",
"accrdn_contents_three": "content three",
"accrdn_title_four": "titile four",
"accrdn_contents_four": "content four",
"accrdn_title_five": "title five",
"accrdn_contents_five": "content five",
"accrdn_title_six": "title six",
"accrdn_contents_six": "content six",
"beta_language": 1
}
]
},
{
"id": 4,
"language": "Japanese",
"created_by": "John Doe",
"created_date": "2018-01-09T01:35:23.743333Z",
"beta_project": 1
}
]
},
{
"id": 2,
"project_name": "Project102",
"created_by": "Tsn",
"updated_by": "Chad Change",
"created_date": "2018-01-05T03:13:08Z",
"updated_date": "2018-01-05T03:13:08Z",
"is_deleted": false,
"languages": [
{
"id": 2,
"language": "Traditional Chines",
"created_by": "John Doe",
"created_date": "2018-01-04T04:46:16Z",
"beta_project": 2,
"details": [
{
"id": 4,
"phase_name": "BetaPhase103",
"created_date": "2018-01-04T04:37:13Z",
"created_by": "John Doe",
"phase_title": "BetaTitle",
"external_url": "www.nba.com",
"segment": "Consumer",
"locale": "English",
"is_published": false,
"beta_start_date": "2010-10-10T00:00:00Z",
"beta_end_date": "2018-01-01T00:00:00Z",
"project_owner": "John Doe",
"project_subtitutes": "Gelly",
"last_update_date": "2018-01-04T04:37:13Z",
"last_updated_by": "John Doe",
"last_published_date": "2018-01-04T04:37:13Z",
"last_published_by": "TRex",
"accrdn_title_one": "title one",
"accrdn_contents_one": "content one",
"accrdn_title_two": "title two",
"accrdn_contents_two": "content two",
"accrdn_title_three": "title three",
"accrdn_contents_three": "content three",
"accrdn_title_four": "titile four",
"accrdn_contents_four": "content four",
"accrdn_title_five": "title five",
"accrdn_contents_five": "content five",
"accrdn_title_six": "title six",
"accrdn_contents_six": "content six",
"beta_language": 2
}
]
}
]
},
{
"id": 10,
"project_name": "Project103",
"created_by": "Max",
"updated_by": "Fried",
"created_date": "2018-01-05T03:13:08Z",
"updated_date": "2018-01-05T03:13:08Z",
"is_deleted": false,
"languages": [
{
"id": 3,
"language": "Simplified Chines",
"created_by": "John Doe",
"created_date": "2018-01-09T01:34:26.240000Z",
"beta_project": 10
}
]
}
]
1 个答案:
答案 0 :(得分：1)
看到这个，
https://jsfiddle.net/xianshenglu/5wtLffjp/1/
核心代码：
function transData(data) {
let dataTemp = JSON.parse(JSON.stringify(data));
function iteratorProperty(dataTemp, propertyArray, level) {
if (dataTemp != undefined) {
dataTemp.forEach((obj, index) => {
Object.keys(obj).forEach((key, val) => {
if (propertyArray.indexOf(key) === -1) {
delete obj[key];
}
});
switch (level) {
case 0:
iteratorProperty(obj.languages, ['language', 'details'], 1);
break;
case 1:
iteratorProperty(obj.details, ['phase_name'], 2);
break;
}
});
}
return dataTemp;
}
iteratorProperty(dataTemp, ['project_name', 'languages'], 0);
return dataTemp;
}
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