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1. Updating all data trees under an anchor with root node xPath "/"

   Code Block
   title CURL request to update multiple leaves across multiple data trees collapse true
   curl --location --request PATCH 'http://localhost:8080/cps/api/v1/dataspaces/testDataspace/anchors/sample/nodes?xpath=%2F' --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' --header 'Cookie: JSESSIONID=node0iyclt1syzfqj28jzo5qc5gks1.node0' \ --data '{ "multiple-data-tree:interface-A": { "host-name": "host-A", //value to be updated "interface": [ //List Data Node { "name": "Interface-A", "address": "10.10.10.100", //value to be updated "subnet-mask": "255.255.255.25",   //value to be updated       "enabled": false } ], "domain": "true" }, "multiple-data-tree:interface-B": { "interface": [ //List Data Node { "name": "Interface-B", "address": "10.10.10.100",     //value to be updated         "subnet-mask": "255.255.255.0" } ] } }'

   Response: 500 Server Error

   Code Block
   collapse true
   { "status": "500 INTERNAL_SERVER_ERROR", "message": "could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not execute statement", "details": "Check logs for details." }

   Reason: The following scenario would fail because CPS Patch operation only supports updating multiple leaves under one container node at a time. And here when we try to update multiple leaves present in two different containers the operations fails. 
   
   On performing Get operation we get the following JSON data, here none of the leaves are updated

   Code Block
   collapse true
   [ { "int:interface-A": { "domain": "false", "host-name": "host", "interface": [ { "name": "Interface-A", "address": "10.10.10.1", "enabled": false, "subnet-mask": "255.255.255.0" } ] } }, { "int:interface-B": { "interface": [ { "name": "Interface-B", "address": "10.10.10.1", "subnet-mask": "255.255.255.0" } ] } } ]

   
   

2. Updating the first data treedata trees individually, leads to successful updation
   When updating multiple leaves present under individual data nodes the operation successfully executes.

   Code Block
   title CURL request to update

   first data tree

   leaves under container data node collapse true

   code

   curl --location --request PATCH 'http://localhost:8080/cps/api/v1/dataspaces/testDataspace/anchors/sample/nodes?xpath=%2Finterface-A%2F' \ --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' --header 'Cookie: JSESSIONID=node0iyclt1syzfqj28jzo5qc5gks1.node0' \ --data '{ "int:interface-A": { "namedomain": "Interface-A", "address": "10.10.10.200", true", //value to be updated "host-name": "Host-A" "enabled": true, //value to be updated "subnet-mask": "255.255.255.0" } }'} }'

   Response 200 OK
   

   code

   Code Block
   title Updated data after making get request
   collapse true
   [ { "int:interface-A": { "domain": "falsetrue", //updated "host-name": "hostHost-A", //updated "interface": [ { "name": "Interface-A", "address": "10.10.10.200", //updated "enabled": true, //updated "subnet-mask": "255.255.255.0" } ] } } ]

   Updating the second data tree

   
   

   Code Block
   title CURL request to update

   second data treecode

   leaves of one list item in a list data node collapse true

   curl --location --request PATCH 'http://localhost:8080/cps/api/v1/dataspaces/testDataspace/anchors/sample/nodes?xpath=%2Finterface-B' \ --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' --header 'Cookie: JSESSIONID=node0iyclt1syzfqj28jzo5qc5gks1.node0' \ --data '{ "int:interface": { "name": "Interface-B", "address": "10.10.10.200", //value to be updated "subnet-mask": "255.255.255.10" //value to be updated } }'

   Response 200 OK
   

   code

   Code Block
   title Updated data after making get request
   collapse true
   [ { "int:interface-B": { "interface": [ { "name": "Interface-B", "address": "10.10.10.200", //updated "subnet-mask": "255.255.255.10" //updated } ] } } ]

   
   

Inconsistencies with Patch Operation

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Assuming the following data is in the data base, having one leaf node in each data tree

{
  "first-container": {
    "a-leaf": "a-value"
  },
  "last-container": {
    "x-leaf": "x-value"
  }
}

An update operation is performed on both data trees as follows:

curl --location --request PATCH 'http://localhost:8080/cps/api/v1/dataspaces/testDataspace/anchors/multipleDataTree/nodes?xpath=%2F' --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' --header 'Cookie: JSESSIONID=node0kglnliqz1tzc1g0x6opgrphei0.node0' \
--data '{
  "first-container": {
    "a-leaf": "a-new-value"
  },
  "last-container": {
    "x-leaf": "x-new-value"
  }
}'

On performing a get operation, it is noticed that only first data tree gets updated

[
  {
    "multiple-data-tree:last-container": {
      "x-leaf": "x-new-value"
    }
  },
  {
    "multiple-data-tree:first-container": {
      "a-leaf": "a-value"
    }
  }
]

The same behavior is seen in the first scenario above, where if the leaves are updated and the list is left as it is. Then only the leaf node of second data tree gets updated.

When updating list node and leaf node under one container node, returns Status 200 but list data is not updated

When updating multiple list items under a list node, returns Status 200 but list data is not updated

((Note: This following finding was identified as an issue with list-nodes and not multiple data nodes. It is documented separately CPS-1383: Investigate CPS-Path for modifications of multiple fragments under an anchor.)

Assuming the following data is in the databse

{
  "int:interface-A": {
    "domain": "false",
    "host-name": "host",
    "interface": [
      {
        "name": "Interface-A",
        "address": "10.10.10.200",
        "enabled": true,
        "subnet-mask": "255.255.255.0"
      }
    ]
  }
}

When performing update operation with xPath set as root

curl --location --request PATCH 'http://localhost:8080/cps/api/v1/dataspaces/testDataspace/anchors/sample/nodes?xpath=%2F' --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' --header 'Cookie: JSESSIONID=node01ejoiyh1brii5zx8z9mk2r39l1.node0' \
--data '{
  "int:interface-A": {
    "domain": "false",
    "host-name": "New-Host",			//value to be updated 
    "interface": [
      {
        "name": "Interface-A",
        "address": "10.10.10.0",		//value to be updated
        "enabled": false,				//value to be updated
        "subnet-mask": "255.255.255.0"
      }
    ]
  }
}'

Status 200 OK is returned, but on performing the Get operation it is noticed only the leaf nodes get updated and list node remains as it is.

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