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源数据：
{ "openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ", "courseID": "EC A7 D5 95", "courseName": "tiandizhijian", "studentCount": "2", "parts": [{ "actions": [{ "typeID": "30" }, { "typeID": "30" } ], "singleTime": "30", "restTime": "60" }, { "actions": [{ "typeID": "30" }, { "typeID": "30" } ], "singleTime": "30", "restTime": "60" } ] }
存入数据库示意 
uniqueCode为每节课的编码(以区分courseID重复的情景，表示唯一性)，actionsIndex表示
{
“actions”: […],
“singleTime”: “30”,
“restTime”: “60”
}
这段数据在parts中的下标，为取数据时辨别typeID的分组作个标识
select数据之后数据为:
[{
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "E2EFE01E18F90861C667CED170552FC3",
"courseID": "51 5D 49 F3",
"courseName": "\u5927\u660e",
"studentCount": "2",
"actionsIndex": "0",
"singleTime": "30",
"restTime": "60",
"typeID": "1"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "E2EFE01E18F90861C667CED170552FC3",
"courseID": "51 5D 49 F3",
"courseName": "\u5927\u660e",
"studentCount": "2",
"actionsIndex": "0",
"singleTime": "30",
"restTime": "60",
"typeID": "3"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "E2EFE01E18F90861C667CED170552FC3",
"courseID": "51 5D 49 F3",
"courseName": "\u5927\u660e",
"studentCount": "2",
"actionsIndex": "1",
"singleTime": "30",
"restTime": "60",
"typeID": "5"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "E2EFE01E18F90861C667CED170552FC3",
"courseID": "51 5D 49 F3",
"courseName": "\u5927\u660e",
"studentCount": "2",
"actionsIndex": "1",
"singleTime": "30",
"restTime": "60",
"typeID": "7"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "8875ED583EFCB51A3603FE22309AA57F",
"courseID": "66 6A CC 98",
"courseName": "\u4e1c\u6b27\u4e1c",
"studentCount": "6",
"actionsIndex": "0",
"singleTime": "30",
"restTime": "60",
"typeID": "1"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "8875ED583EFCB51A3603FE22309AA57F",
"courseID": "66 6A CC 98",
"courseName": "\u4e1c\u6b27\u4e1c",
"studentCount": "6",
"actionsIndex": "0",
"singleTime": "30",
"restTime": "60",
"typeID": "3"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "8875ED583EFCB51A3603FE22309AA57F",
"courseID": "66 6A CC 98",
"courseName": "\u4e1c\u6b27\u4e1c",
"studentCount": "6",
"actionsIndex": "0",
"singleTime": "30",
"restTime": "60",
"typeID": "5"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "8875ED583EFCB51A3603FE22309AA57F",
"courseID": "66 6A CC 98",
"courseName": "\u4e1c\u6b27\u4e1c",
"studentCount": "6",
"actionsIndex": "1",
"singleTime": "30",
"restTime": "60",
"typeID": "7"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "8875ED583EFCB51A3603FE22309AA57F",
"courseID": "66 6A CC 98",
"courseName": "\u4e1c\u6b27\u4e1c",
"studentCount": "6",
"actionsIndex": "1",
"singleTime": "30",
"restTime": "60",
"typeID": "2"
}, {
"openID": "ouGzJv7G23rRCC0Bt70e1JLM70yQ",
"uniqueCode": "8875ED583EFCB51A3603FE22309AA57F",
"courseID": "66 6A CC 98",
"courseName": "\u4e1c\u6b27\u4e1c",
"studentCount": "6",
"actionsIndex": "1",
"singleTime": "30",
"restTime": "60",
"typeID": "4"
}]
将这些数据变为源数据的格式返回？
$arr = array();
foreach ($res as $key) {
# code...
if(!array_key_exists($key->courseid ,$arr)){
$arr[$key->courseid] = array();
$arr[$key->courseid]['actions'] = array();
}
$arr[$key->courseid]['courseID'] = $key->courseid;
$arr[$key->courseid]['courseName'] = $key->courseName;
$arr[$key->courseid]['usageCount'] = $key->usageCount;
$a = [
"typeID" => $key->typeID,
"setCount" => $key->setCount,
"countPerSet" => $key->countPerSet,
"timeInterval" => $key->timeInterval,
];
array_push($arr[$key->courseid]['actions'], $a);
}
$res = array();
foreach ($arr as $key => $value) {
# code...
array_push($res, $value);
}
$obj = new stdClass();
$obj->lessons = $res;
//$obj为返回数据
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