bash 使用 jq (cmdline) 添加 json 数组元素
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Add json array element with jq (cmdline)
提问by Layfon Weller
I'm trying to generate a json file within bash. I installed jq, hoping that it would help me generate and append json.
我正在尝试在 bash 中生成一个 json 文件。我安装了 jq，希望它能帮助我生成和附加 json。
For example, I want to generate a json in this format:
例如，我想以这种格式生成一个json：
{
"Project": [
{
"projectName": {
"branch": [
{
"branchName": [
"path"
]
}
],
"tag": [
{
"tagName": [
"path"
]
}
]
}
}
]
}
While a can to something like that, with the following filter
虽然可以使用以下过滤器
.Project=.Project+.Project+
[{"projectName" : {"branch" : (.branch+[{"branchName":(.tagName+["path"])}]),
"tag": (.tag+[{"tagName":(.tagName+["path"])}]) }}]
when I want to create another entry in the same project and name, it creates a whole new entry, has if it was a new project, resulting in this:
当我想在同一个项目和名称中创建另一个条目时，它会创建一个全新的条目，如果它是一个新项目，结果如下：
{
"Project": [
{
"projectName": {
"branch": [
{
"branchName": [
"path"
]
}
],
"tag": [
{
"tagName": [
"path"
]
}
]
}
},
{
"projectName": {
"branch": [
{
"branchName": [
"path"
]
}
],
"tag": [
{
"tagName": [
"path"
]
}
]
}
},
{
"projectName": {
"branch": [
{
"branchName": [
"path2"
]
}
],
"tag": [
{
"tagName": [
"path2"
]
}
]
}
}
]
}
But I would like to have
但我想拥有
{
"Project": [
{
"projectName": {
"branch": [
{
"branchName": [
"path",
"path2"
]
}
],
"tag": [
{
"tagName": [
"path",
"path2"
]
}
]
}
}
]
}
Is there a way with jq/bash?
jq/bash 有没有办法？
回答by zerodiff
So, I'm taking a stab in the dark here (to mix metaphors), but this gives what seems to be the results you want:
所以，我在这里暗中试探（混合隐喻），但这给出了你想要的结果：
cat test.json | jq '.Project[0].projectName.tag[0].tagName |= .+ ["path2"] | .Project[0].projectName.branch[0].branchName |= .+ ["path2"]'
The |= .+ [...]essentially appends a new array item. You can use the array specs for good effect for all array elements by omitting the 0from, e.g., tag[0].
在|= .+ [...]本质上追加新的数组项。您可以通过省略0from，例如，对所有数组元素使用数组规范以获得良好的效果tag[0]。
This produces:
这产生：
{
"Project": [
{
"projectName": {
"tag": [
{
"tagName": [
"path",
"path2"
]
}
],
"branch": [
{
"branchName": [
"path",
"path2"
]
}
]
}
}
]
}
Edit -- if I understand the new method now (but I could be missing something), we start with:
编辑——如果我现在理解新方法（但我可能遗漏了一些东西），我们开始：
{
"Project": {
"projectName": {
"tag": {
"tagName": [
"path",
]
},
"branch": {
"branchName": [
"path",
]
}
}
}
}
Then set some variables and apply this transform:
然后设置一些变量并应用此转换：
Project=projectName ProjectNumber=path2 Branch=branchName Tag=tagName
jq ".Project.${Project}.tag.${Tag} |= .+ [\"${ProjectNumber}\"] | .Project.${Project}.branch.${Branch} |= .+ [\"${ProjectNumber}\"]"
And we get:
我们得到：
{
"Project": {
"projectName": {
"tag": {
"tagName": [
"path",
"path2"
]
},
"branch": {
"branchName": [
"path",
"path2"
]
}
}
}
}
