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How to create patch for merge_patch input ? #2018
Description
Hello,
I need to generate a patch like the one from merge_patch example :
// the patch
json patch = R"({
"title": "Hello!",
"phoneNumber": "+01-123-456-7890",
"author": {
"familyName": null
},
"tags": [
"example"
]
})"_json;
Is there an existing function to generate this ?
I tried diff function but it create a list of actions to apply, so not what I need.
I search somthing working like this:
// the source document
json source = R"(
{
"baz": "qux",
"foo": "bar"
}
)"_json;
// the target document
json target = R"(
{
"baz": "boo",
"hello": [
"world"
]
}
)"_json;
// create the patch
json patch = json::diff(source, target);Where patch will be
{
"baz": "boo",
"foo": null,
"hello": [
"world"
]
}
Thank you for your help.
Activity
nickaein commentedon Mar 31, 2020
I don't believe this is currently supported out of the box. The library supports applying JSON Merge Patches through
merge_patch()function, but there is no counterpart "merge_diff" function to generate one. There are some considerations before implementing a general-purpose one (e.g. how to handlenullvalues in source).nlohmann commentedon Mar 31, 2020
@nickaein is right.
dota17 commentedon Apr 8, 2020
Is there a plan to support this case?
nlohmann commentedon Apr 11, 2020
There is no real specification for this. Merge requests are welcome!
stale commentedon May 13, 2020
This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.