MoonlightDB 1.1

Moonlight is a lightweight JSON-database for Python.

Moonlight

Moonlight is a lightweight JSON-database for Python.

Installing database library

pip install Moonlight

Class

Moonlight - database management class

Has the following set of methods:

0. async push()
1. async all()
2. async get()
3. async update()
5. async delete()
6. async drop()

Creating database

You just need to create an instance of the Moonlight-class, passing the path to the JSON file as an argument.

For example,

from Moonlight import Moonlight

database: Moonlight = Moonlight('../databases/database.json')

Arguments

• filename - path to database .json-file
• primary_key - primary key name (default: 'id')
• show_messages - tuple of messages that will be output during operation (default: ('warning', 'error'))
  • 'success'
  • 'warning'
  • 'error'

Methods

Method examples will be given using the database variable we set.

Quick Methods

• 0. Moonlight.push

• 1. Moonlight.all

• 2. Moonlight.get

• 3. Moonlight.update

• 5. Moonlight.delete

• 6. Moonlight.drop

push()

Adds an object with the given fields to the database

Arguments:

• data_to_push (dict[str, any]) - the key-value dictionary to be added to the database

Returns id (int).

identifier: int = await database.push(
    {
        'name'       : 'Bertram Gilfoyle',
        'job'        : 'Pied Piper Inc.',
        'occupation' : 'Vice President Of Architecture'
    }
)

print(identifier) 
# output >> 22104564398807 
#           ^^^^^^^^^^^^^^
# ID is 14-digit integer

all()

Get all objects from the database

Returns all_objects (list[dict[str, any]])

data: list[dict[str, any]] = await database.all()

print(data)
# output >> 
# [
#   {
#       'id': 22104564398807, 
#       'name': 'Bertram Gilfoyle', 
#       'job': 'Pied Piper Inc.', 
#       'occupation': 'Vice President Of Architecture'
#   }
# ]

get()

Get object/s from the database by query

Arguments

• query (dict[str, any]) - the key-value dictionary to find in database

Returns object/s (list[dict[str, any]]).

data: list[dict[str, any]] = await database.get({
    'job' : 'Pied Piper Inc.'
})

print(data)
# output >> 
# [
#   {
#       'id': 22104564398807, 
#       'name': 'Bertram Gilfoyle', 
#       'job': 'Pied Piper Inc.', 
#       'occupation': 'Vice President Of Architecture'
#   }
# ]

update()

Update object in the database

Arguments

• data_to_update (dict[str, any]) - the key-value dictionary to change in object in database (primary_key in data_to_update required!)

Returns id (int).

await database.update(
    {
        'id'         : 22104564398807, 
        'occupation' : 'Network engineer'
    }
)
# changed to >> 
# [
#   {
#       'id': 22104564398807, 
#       'name': 'Bertram Gilfoyle', 
#       'job': 'Pied Piper Inc.', 
#       'occupation': 'Network engineer'
#   }
# ]

delete()

Remove object from the database

Arguments

• id (14-digit int) - identifier of element

Returns object (dict[str, any])

await database.delete(22104564398807)

# database file changed to >> 
# {
#   "data": []
# }
#
# will returned >>
#   {
#       'id': 22104564398807, 
#       'name': 'Bertram Gilfoyle', 
#       'job': 'Pied Piper Inc.', 
#       'occupation': 'Network engineer'
#   }

drop()

Removes all database data

await database.drop()

# database-file writes >>
# {
#   "data": []
# }

Author

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Thank you a lot!

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