MongoSchemaImportExport 0.2

Import/Export Mongo Schema
===================
Import and export mongodb schemas **without** copying all the data. It will extract the following meta data about a mongo database:

* Collections
* Indexes
* Cap sizes
* Schema validators

The primary use case is when you have developed an application that uses mongodb, and want to setup a new instance with
the appopriate database layout. You can then provide a `config.json` file with your application and have this script
setup the database for you!

This data will be stored in a `json` file for a database that looks something like this:

```json
{
"databases": {
"test": {
"location": {
"indexes": [
{
"name": "_id_",
"keys": [
[
"_id",
1
]
]
},
{
"name": "pos_2dsphere",
"2dsphereIndexVersion": 3,
"keys": [
[
"pos",
"2dsphere"
]
]
},
{
"name": "device_1_timestamp_1",
"keys": [
[
"device",
1
],
[
"timestamp",
1
]
]
}
],
"options": {}
},
"users": {
"indexes": [
{
"name": "_id_",
"keys": [
[
"_id",
1
]
]
},
{
"unique": true,
"name": "username_idx",
"keys": [
[
"username",
1
]
]
}
],
"options": {
"validator": {
"$jsonSchema": {
"bsonType": "object",
"required": [
"username",
"password",
"level"
],
"properties": {
"username": {
"bsonType": "string",
"description": "must be a string and is required"
},
"level": {
"bsonType": "string",
"enum": [
"user",
"admin",
"moderator"
],
"description": "must be a string"
},
"password": {
"bsonType": "string",
"description": "must be a bcrypt password",
"pattern": "^\\$2b\\$\\d{1,2}\\$[A-Za-z0-9\\.\\/]{53}$"
}
}
}
},
"validationLevel": "strict",
"validationAction": "error"
}
},
"capped": {
"indexes": [
{
"name": "_id_",
"keys": [
[
"_id",
1
]
]
},
{
"unique": true,
"name": "key_1",
"keys": [
[
"key",
1
]
]
}
],
"options": {
"capped": true,
"size": 64000,
"max": 5000,
"validator": {
"$jsonSchema": {
"bsonType": "object",
"description": "Simple key value store",
"required": [
"key",
"value"
],
"properties": {
"key": {
"bsonType": "string",
"maxLength": 64.0,
"description": "the key value"
},
"value": {
"bsonType": "string",
"description": "the associated value"
}
}
}
},
"validationLevel": "strict",
"validationAction": "error"
}
}
}
},
"exported": "2018-07-18T17:12:43.460992"
}
```

Installation
------------

```bash
pip install MongoSchemaImportExport
```

Usage
-----
Make sure the user you are using to import/export has the appropriate privileges, they'll probably need to have the
`root` role or `dbOwner` on the source and destination.
To export your data run:

```bash
mongo-schema-export --uri mongodb://user:password@database.host1.com:27017/admin --databases test2,testIgnore
```

To import your schema run as bellow. Use `--delete-col` to delete collections before creating them (you cannot change
an existing collection into a capped one, although, you can set a validator after creation):

```bash
mongo-schema-import --uri mongodb://user:password@database.host2.com:27017/admin --databases db_1,db_2 --verbose --delete-col
```
You will get an output like this:

```
Skipping: testIgnore
Creating database: test2
Dropping collection location
Creating collection: location
Options {}
Creating index: {'name': '_id_', 'keys': [['_id', 1]]}
Creating index: {'name': 'pos_2dsphere', '2dsphereIndexVersion': 3, 'keys': [['pos', '2dsphere']]}
Creating index: {'name': 'device_1_timestamp_1', 'keys': [['device', 1], ['timestamp', 1]]}
Dropping collection users
Creating collection: users
Options {'validator': {'$jsonSchema': {'bsonType': 'object', 'required': ['username', 'password', 'level'], 'properties': {'username': {'bsonType': 'string', 'description': 'must be a string and is required'}, 'level': {'bsonType': 'string', 'enum': ['user', 'admin', 'moderator'], 'description': 'must be a string'}, 'password': {'bsonType': 'string', 'description': 'must be a bcrypt password', 'pattern': '^\\$2b\\$\\d{1,2}\\$[A-Za-z0-9\\.\\/]{53}$'}}}}, 'validationLevel': 'strict', 'validationAction': 'error'}
Creating index: {'name': '_id_', 'keys': [['_id', 1]]}
Creating index: {'unique': True, 'name': 'username_idx', 'keys': [['username', 1]]}
Dropping collection capped
Creating collection: capped
Options {'capped': True, 'size': 64000, 'max': 5000, 'validator': {'$jsonSchema': {'bsonType': 'object', 'description': 'Simple key value store', 'required': ['key', 'value'], 'properties': {'key': {'bsonType': 'string', 'maxLength': 64.0, 'description': 'the key value'}, 'value': {'bsonType': 'string', 'description': 'the associated value'}}}}, 'validationLevel': 'strict', 'validationAction': 'error'}
Creating index: {'name': '_id_', 'keys': [['_id', 1]]}
Creating index: {'unique': True, 'name': 'key_1', 'keys': [['key', 1]]}

```


If you get permission errors, make sure your user has the right roles to read and write databases and collections.