DynFork

ORM-like API MongoDB for Crystal language.

DynFork is built around Cryomongo and is more focused on web development.
For simulate relationship Many-to-One and Many-to-Many,
a simplified alternative (Types of selective fields with dynamic addition of elements) is used.
The project is focused on web development.

Compatible with MongoDB 3.6+. Tested against: 4.4, 6.0, 7.0
For more information see Cryomongo.

Documentation

Online browsable documentation is available at https://kebasyaty.github.io/dynfork/.

Requirements

View the list of requirements.

Installation

Install MongoDB (if not installed):
Install additional libraries (if not installed):

Add the dependency to your shard.yml:

dependencies:
  dynfork:
    github: kebasyaty/dynfork
    version: ~> 0.7.1

Run shards install

Usage

It is recommended to look at examples here.

require "dynfork"

# Create your model.
@[DynFork::Meta(service_name: "Accounts")]
struct User < DynFork::Model
  getter username = DynFork::Fields::TextField.new
  getter email = DynFork::Fields::EmailField.new
  getter birthday = DynFork::Fields::DateField.new
end

# Initialize locale.
# https://github.com/crystal-i18n/i18n
I18n.config.loaders << I18n::Loader::YAML.new("config/locales")
I18n.config.default_locale = :en
I18n.init

# Run migration.
# https://elbywan.github.io/cryomongo/Mongo/Client.html
DynFork::Migration::Monitor.new(
  app_name: "AppName",
  unique_app_key: "Towr5kKQM5H3Lb0b",
  mongo_client: Mongo::Client.new("mongodb://localhost:27017")
).migrat

# Create a user.
user = User.new

# Add user data.
user.username.value = "username"
user.email.value = "[email protected]"
user.birthday.value = "1970-01-01"

# Save user.
# Hint: print_err - convenient for development.
user.print_err unless user.save

# Print user details.
puts "User details:"
if id = user.object_id?
  pp User.find_one_to_hash({_id: id})
end

puts "Documwnt count: #{User.estimated_document_count}"

puts "Deleting a document."
user.delete

puts "Documwnt count: #{User.count_documents}"

See more examples here.

Model Parameters

See the documentation here.

( only `service_name` is a required parameter )

Parameter	Default	Description
service_name	no	Examples: Accounts \| Smartphones \| Washing machines \| etc ...
fixture_name	no	The name of the fixture in the config/fixtures directory (without extension). Examples: SiteSettings \| AppSettings \| etc ...
db_query_docs_limit	1000	limiting query results.
migrat_model?	true	Set to false if you do not need to migrate the Model to the database. This can be use to validate a web forms - Search form, Contact form, etc.
create_doc?	true	Can a Model create new documents in a collection? Set to false if you only need one document in the collection and the Model is using a fixture.
update_doc?	true	Can a Model update documents in a collection?
delete_doc?	true	Can a Model remove documents from a collection?

Example:

  @[DynFork::Meta(
    service_name: "ServiceName",
    fixture_name: "FixtureName",
    db_query_docs_limit: 1000,
    migrat_model?: true,
    create_doc?: true,
    update_doc?: true,
    delete_doc?: true,
  )]
  struct User < DynFork::Model
    getter username = DynFork::Fields::TextField.new
    getter birthday = DynFork::Fields::DateField.new
  end