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Customize the MongoDB CLI Output

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  • Go templates
  • json-path Output Type

You can customize the MongoDB CLI output fields and format using a Go template or a JSON path.

Go templates

You can specify the Go template with the command for a simple output or through a separate file for a complex output. For information on the template, see Package template. For information on the types and properties available for each response, see:

Syntax

You can specify a template with the command using the --output or -o option:

--output|-o go-template="{{<template>}}"

You can specify a template using a file using the --output or -o option:

--output|-o go-template-file="<path-to-template-file>"

Examples

Retrieve the Number of Projects

The following command uses the template to retrieve a count of the number of projects in the specified organization using the default profile:

mongocli iam projects ls --orgId 5ab5cedf5g5h5i5j5kl12mn4 -o go-template="Count: {{.TotalCount}}"

The preceding command returns the following output:

Count: 2

Retrieve Your Atlas Cluster Connection String

The following mongocli-atlas-clusters-describe command uses the template to retrieve the connection string for an Atlas cluster named getStarted. It uses the default profile for accessing Atlas.

mongocli atlas clusters describe getStarted -o go-template="Parse: {{.SrvAddress}}"

The previous command returns a string similar to the following:

Parse: mongodb+srv://getstarted.example.mongodb.net

You can use the MongoDB Shell, mongosh, to connect to the getStarted cluster with the srvAddress and the connection string. This example uses the connection string returned by the previous command.

mongo "mongodb+srv://getstarted.example.mongodb.net" --username User1 --password ChangeThisPasswordToSomethingSecure

For example, consider the following file named template.tmpl:

Projects: {{range .Results}}{{.ID}} {{end}}

The following command uses the template.tmpl file to retrieve the IDs of the projects in the specified organization using the default profile:

mongocli iam projects ls --orgId 5ab5cedf5g5h5i5j5kl12mn4 -o go-template-file="template.tmpl"

The preceding command returns the following output:

Projects: 5e2211c17a3e5a48f5497de3 5f455b39749bea5fb575dccc

json-path Output Type

The json-path output type limits the results of a command to the fields you specify.

Usage

When you add the --output option to a command, you can specify the type json-path. You must provide json-path with an expression to evaluate against your results, which means you must be aware of the json fields returned by your command.

Syntax

<command> --output|-o json-path='$<expression>'

json-path expressions refer to the JSON element that a MongoDB CLI command returns. The $ character represents the root element, which is usually an object or an array.

For a list of valid characters and their functions, see JSONPath expressions.

Examples

Return the description of the first API key in a list

In the following example, a user retrieves their API keys with mongocli iam organizations apiKeys list. The json-path expression limits the output to the desc field of the first key, rather than returning the entire list of keys.

mongocli iam organization apikeys list --output json-path='$[0].desc'
> owner_key

Running the same command with --output json returns the full JSON element from the API. It's important to understand the JSON structure returned by a command in order to operate on it with json-path.

Using the the following full JSON output for reference, the --output json-path with the expression $[0].desc finds and returns only the value "owner_key":

[ //``$`` represents the outer array.
  { // ``[0]`` refers to the first element in the array (using a 0-based index).
    "id": "60e736a95d585d2c9ccf2d19",
    "desc": "owner_key", //``.desc`` refers to the ``desc`` field of that element.
    "roles": [
      {
        "orgId": "5d961a949ccf64b4e7f53bac",
        "roleName": "ORG_OWNER"
      }
    ],
    "privateKey": "********-****-****-c4e26334754f",
    "publicKey": "xtfmtguk"
  },
  {
    "id": "d2c9ccf2d1960e736a95d585",
    "desc": "member_key",
    "roles": [
      {
        "orgId": "5d961a949ccf64b4e7f53bac",
        "roleName": "ORG_MEMBER"
      }
    ],
    "privateKey": "********-****-****-c4e26334754f",
    "publicKey": "vfgcttku"
  },
]

Return the description of a specific API key in a list

In the following example, a user retrieves their API keys with mongocli iam organizations apiKeys list. The json-path expression limits the output to the desc field of the specific JSON object with id d2c9ccf2d1960e736a95d585.

mongocli iam organization apikeys list --output json-path='$[? @.id=="d2c9ccf2d1960e736a95d585"].desc'
> member_key

Return the status of a private endpoint

In the following example, a user retrieves information for a private endpoint with mongocli-atlas-privateEndpoints-aws-describe. The json-path expression limits the output to the status field of the root element.

mongocli atlas privateendpoint aws describe 601a4044da900269480a2533 --output json-path='$.status'
> WAITING_FOR_USER

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