所以,有这个结构(从A1开始 - 显示片段>运行):
table {
border-color: #BBB;
border-width: 0px 0px 1px 1px;
border-style: dotted;
}
body {
font: 12px Arial, Tahoma, Helvetica, FreeSans, sans-serif;
color: #333;
}
td {
border-color: #BBB;
border-width: 1px 1px 0px 0px;
border-style: dotted;
padding: 3px;
}<table>
<tbody>
<tr>
<th></th>
<th>A</th>
<th>B</th>
<th>C</th>
<th>D</th>
</tr>
<tr>
<td>1</td>
<td>Title 1</td>
<td>Title 2</td>
<td>Title 3</td>
<td>Title 4</td>
</tr>
<tr>
<td>2</td>
<td>GH</td>
<td>1</td>
<td>434</td>
<td>4</td>
</tr>
<tr>
<td>3</td>
<td>TH</td>
<td>3</td>
<td>435</td>
<td>5</td>
</tr>
<tr>
<td>4</td>
<td>TH</td>
<td>4</td>
<td>4</td> …非常新,并且在MongoDB上绝对没有受过教育.
拥有这个JSON结构:
{
"id": "123456",
"makes": {
"abc": {
"att1": 4,
"att2": "fffff",
"att3": 46
},
"fgh": {
"att1": 8,
"att2": "ggggg",
"att3": 6
},
"rty": {
"att1": 3,
"att2": "hhhh",
"att3": 4
},
"iop": {
"att1": 4,
"att2": "llll",
"att3": 3
}
}
}
如何查询数据库中的"fgh"make？我试过了:
db.<myCollection>.find({"makes":"fgh"})
但这不起作用.如果我写,它工作正常:
db.<myCollection>.find({"makes.fgh.att1":8})
先感谢您!