Replace part of the value of a json using regex and jq

I have a json like bellow:

[
  {
    "name": "architecture-design-detailed",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }
]

If name is architecture-design-detailed,

• change name to new_name_here

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• replace last part of rootPath (which is architecture-design-detailed, after the last /) with new_name_here.

So the expected output is:

[
  {
    "name": "new_name_here",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/new_name_here",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }
]

What I came up with so far is:

jq 'map(if .name == "architecture-design-detailed" then .name = "new_name_here" else . end)'

But not understanding how to replace last part of rootPath. I think we have to use sub or gsub. But not understanding how.

>Solution :

You can use split("/") to convert rootPath to an array, then set the last index (.[-1]) to new_name and then join("/") them back together.

We use |= inside map() to just update those objects found by select() and then overwrite .name and rootPath as needed.

map(select(.name == "architecture-design-detailed") 
    |= ( 
        .name = "new_name",
        .rootPath = (.rootPath | split("/") | .[-1] = "new_name" | join("/"))
    ) 
)

[
  {
    "name": "new_name",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/new_name",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }
]

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