how to delete nested object

[oliviermorpa]

good am,
i dont know how to do. i was looking all day on google to have some example but this time, google is not my friend.
can someone tell me how to do ? a lot of thank in advance

Im looking how to use deepdash to keep only part of json if match.
here is my 2 examples

original data:

[
  {
    "id":1,
    "createdByIdt":"U001",
    "level1":[
      {
        "projectIdt":1,
        "level2":[
          {
            "title":"title 1",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 2",
            "level3":[]
          }
        ],
        "members1":["U001"]
      },
      {
        "projectIdt":2,
        "level2":[
          {
            "title":"title 6",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U002",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 4",
            "level3":[]
          }
        ],
        "members1":["U001"]
      }
    ],
    "members1":["U002"],
    "members2":[]
  },
  {
    "id":1,
    "createdByIdt":"U002",
    "level1":[
      {
        "projectIdt":11,
        "level2":[
          {
            "title":"title 11",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 12",
            "level3":[]
          }
        ],
        "members1":["U001"]
      },
      {
        "projectIdt":12,
        "level2":[
          {
            "title":"title 16",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 14",
            "level3":[]
          }
        ],
        "members1":["U002"]
      }
    ],
    "members1":["U001","U002"],
    "members2":[]
  }
]

CASE 1: keep only level1->level2->level3-> "userInChargeIdt":"U001"
Result:

[
  {
    "id":1,
    "createdByIdt":"U001",
    "level1":[
      {
        "projectIdt":1,
        "level2":[
          {
            "title":"title 1",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",			<-- keep this one
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 2",
            "level3":[]
          }
        ],
        "members1":["U001"]
      },
      {
        "projectIdt":2,
        "level2":[
          {
            "title":"title 6",
            "level3":[                                                                DELETE THIS PART
                                                                                            {
                                                                                              "createdByIdt":"U001",
                                                                                              "userInChargeIdt":"U002",				
                                                                                              "level4a":[],
                                                                                              "level4b":[]
                                                                                            }
            ]
          },
          {
            "title":"title 4",
            "level3":[]
          }
        ],
        "members1":["U001"]
      }
    ],
    "members1":["U002"],
    "members2":[]
  },
  {
    "id":1,
    "createdByIdt":"U002",
    "level1":[
      {
        "projectIdt":11,
        "level2":[
          {
            "title":"title 11",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 12",
            "level3":[]
          }
        ],
        "members1":["U001"]
      },
      {
        "projectIdt":12,
        "level2":[
          {
            "title":"title 16",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",			<-- keep this one
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 14",
            "level3":[]
          }
        ],
        "members1":["U002"]
      }
    ],
    "members1":["U001","U002"],
    "members2":[]
  }
]

CASE 2 : Keep keep only level1->level2-> " members1" includes "U001"

[
  {
    "id":1,
    "createdByIdt":"U001",
    "level1":[
      {
        "projectIdt":1,
        "level2":[
          {
            "title":"title 1",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 2",
            "level3":[]
          }
        ],
        "members1":["U001"]		<--keep this one
      },
      {
        "projectIdt":2,
        "level2":[
          {
            "title":"title 6",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U002",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 4",
            "level3":[]
          }
        ],
        "members1":["U001"]		<-- keep this one
      }
    ],
    "members1":["U002"],
    "members2":[]
  },
  {
    "id":1,
    "createdByIdt":"U002",
    "level1":[
      {
        "projectIdt":11,
        "level2":[
          {
            "title":"title 11",
            "level3":[
              {
                "createdByIdt":"U001",
                "userInChargeIdt":"U001",
                "level4a":[],
                "level4b":[]
              }
            ]
          },
          {
            "title":"title 12",
            "level3":[]
          }
        ],
        "members1":["U001"]		<-- keep this one
         },
                                                                               THIS PART IS DELETED
                                                                                {
                                                                                  "projectIdt":12,
                                                                                  "level2":[
                                                                                    {
                                                                                      "title":"title 16",
                                                                                      "level3":[
                                                                                        {
                                                                                          "createdByIdt":"U001",
                                                                                          "userInChargeIdt":"U001",
                                                                                          "level4a":[],
                                                                                          "level4b":[]
                                                                                        }
                                                                                      ]
                                                                                    },
                                                                                    {
                                                                                      "title":"title 14",
                                                                                      "level3":[]
                                                                                    }
                                                                                  ],
                                                                                  "members1":["U002"]	 
                                                                                }
    ],
    "members1":["U001","U002"],
    "members2":[]
  }
]

[YuriGor]

Hi, to help us help you, please give more details, what is your requirements?
Would be good if you will prepare samples of filtered data exactly as you expect it. In comments you are saying "keep this" but what about rest? What exactly should be filtered out?
Your filtering criteria is also not clear, do you need to keep data from any nested level, filtering by some property name\value, or depth is also important?

[oliviermorpa]

thank for reply.
i try to understand how to delete child part.

i put TABULATION on what i try to delete. its more easy to understand like that than to show the result (i think)
so if you remove the TABULATION codes from rights, its the result than i looking for.

so all parent should be keeping and delete only child who match.
the filter is on a key/value and if it match, i keep all the child. If not i remove all child.
Its not always hte last child where criteria is made (CASE 2 for example)

case 1:level1->level2->level3-> "userInChargeIdt":"U001"
i try to delete all child part from level3 who doesnt match with "userInChargeIdt":"U001"

case2: level1->level2-> " members1" includes "U001"
i try to delete all child part from level2 where members doesnt include "U001"

i put a pdf file with color yellow. the color yellow is the part that sould be deleted (and i want to keep all other part)

hope its clear.
json.pdf

[YuriGor]

Here is an example:
https://codepen.io/yurigor/pen/NWdwRdB?editors=0010

Case 1 is more or less simple (But it was terrible idea to name childrens collections such machineunreadable way like level+some suffix, why not to call it always "level", and nested 'groups' if needed and keep this suffixes as separate properties? Because of current structure we have to use low-level per-property iteration instead of walking by tree of items)

Filtering criteria for case 2 is still not clear - you need to write it explicitly for yourself first.

From your explanation and samples I got that we want to keep all items with member1 U001 altogether with it's nested contents.
At the very end of your data you have top-level item with needed user:

So we cannot delete last highlighted block - it's a nested content of valid item.
Or you have some more complicated criteria.

In case 2 I had to add additional step of collecting all possible children prop names first, to be able to use tree mode, otherwise it would be a hell.

Feel free to fork this codepen to use as starting point and share you adventures here :)

[YuriGor]

P.S. Just updated children prop names part of example a bit

[oliviermorpa]

thanks so much/ its so great and helpfull what you did.
i undestand better how your filter is working.

i change only criteria to be sure we are in level3 (yes there is same key userInchargeIdt in level1 and 2 but i didt put in the example to make it more easy)
i put in BOLD what i add.
Again, thank you so much.

let filteredData = _.filterDeep(
sourceData,
(v, k, p, x) => (!v.userInChargeIdt || (x.parent.key !== 'level3' || v.userInChargeIdt === 'U001')),
{ leavesOnly:false,
onTrue: {
skipChildren: false,
cloneDeep: false
}
}
);