Update a nested array objects in a different collection and position in MongoDB -

i have douments follows.

how update skillcluster name. suppose other document has name :"c" in 4th position.

{   job: {     post: { name:"x" }      skill: {        skillcluster: [         {name:"c++",id:"23"},         {name:"c",id:"898"}       ]     }   } } {   job: {     post: { name:"x" }      skill: {       skillcluster: [         {name:"c++",id:"23"},         {name:"java"},         {name:"python"},         {name:"c",id:"898"}       ]     }   } } 

you need query match "name" field @ embedded level of document using "dot notation", , pass match positional $ operator within update:

db.collection.update(   { "job.skill.skillcluster.name": "c" },   { "$set": { "job.skill.skillcluster.$.name": "simple c"}},   { "multi": true } ) 

also use "multi" flag match , update more 1 document.

the result be:

{     "_id" : objectid("55dbfd0ed96d655eb0ed2b4f"),     "job" : {             "post" : {                     "name" : "x"             },             "skill" : {                     "skillcluster" : [                             {                                     "name" : "c++",                                     "id" : "23"                             },                             {                                     "name" : "simple c",                                     "id" : "898"                             }                     ]             }     } } {     "_id" : objectid("55dbfd0ed96d655eb0ed2b50"),     "job" : {             "post" : {                     "name" : "x"             },             "skill" : {                     "skillcluster" : [                             {                                     "name" : "c++",                                     "id" : "23"                             },                             {                                     "name" : "java"                             },                             {                                     "name" : "python"                             },                             {                                     "name" : "simple c",                                     "id" : "898"                             }                     ]             }     } }