# Mongo.Ecto
[](https://hex.pm/packages/mongodb_ecto)
[](https://hex.pm/packages/mongodb_ecto)
[](https://hexdocs.pm/mongodb_ecto/)
[](https://hex.pm/packages/mongodb_ecto)
[](https://github.com/elixir-mongo/mongodb_ecto/blob/master/LICENSE)
[](https://github.com/elixir-mongo/mongodb_ecto/commits/master)
`Mongo.Ecto` is a MongoDB adapter for Ecto.
For detailed information read the documentation for the `Mongo.Ecto` module,
or check out examples below.
## Example
```elixir
# In your config/config.exs file
config :my_app, Repo,
adapter: Mongo.Ecto,
database: "ecto_simple",
username: "mongodb",
password: "mongosb",
hostname: "localhost"
# In your application code
defmodule Repo do
use Ecto.Repo, otp_app: :my_app
end
defmodule Weather do
use Ecto.Model
@primary_key {:id, :binary_id, autogenerate: true}
schema "weather" do
field :city # Defaults to type :string
field :temp_lo, :integer
field :temp_hi, :integer
field :prcp, :float, default: 0.0
end
end
defmodule Simple do
import Ecto.Query
def sample_query do
query = from w in Weather,
where: w.prcp > 0 or is_nil(w.prcp),
select: w
Repo.all(query)
end
end
```
## Usage
Add `:mongodb_ecto` as a dependency in your `mix.exs` file.
```elixir
def deps do
[
{:mongodb_ecto, "~> 1.0.0"}
]
end
```
You should also update your applications to include both projects:
```elixir
def application do
[applications: [:logger, :mongodb_ecto, :ecto]]
end
```
To use the adapter in your repo:
```elixir
defmodule MyApp.Repo do
use Ecto.Repo,
otp_app: :my_app,
adapter: Mongo.Ecto
end
```
For additional information on usage please see the documentation for [Ecto](http://hexdocs.pm/ecto).
## Data Type Mapping
| BSON |Ecto|
| ---------- |------|
| double |`:float`|
| string |`:string`|
| object |`:map`|
| array |`{:array, subtype}`|
| binary data |`:binary`|
| binary data (uuid) |`Ecto.UUID`|
| object id |`:binary_id`|
| boolean |`:boolean`|
| date |`Ecto.DateTime`|
| regular expression |`Mongo.Ecto.Regex`|
| JavaScript |`Mongo.Ecto.JavaScript`|
| symbol |(see below)|
| 32-bit integer |`:integer`|
| timestamp |`BSON.Timestamp`|
| 64-bit integer |`:integer`|
Symbols are deprecated by the
[BSON specification](http://bsonspec.org/spec.html). They will be converted
to simple strings on reads. There is no possibility of persisting them to
the database.
Additionally special values are translated as follows:
| BSON | Ecto|
| ---------- | ------|
| null | `nil`|
| min key | `:BSON_min`|
| max key | `:BSON_max`|
## Supported Mongo versions
The adapter and the driver are tested against most recent versions from 2
branches: 4.4 and 5.0
## Contributing
To contribute you need to compile `Mongo.Ecto` from source and test it:
```
$ git clone https://github.com/ankhers/mongodb_ecto.git
$ cd mongodb_ecto
$ mix test
```
## Copyright and License
Copyright 2015 Michał Muskała
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at [https://www.apache.org/licenses/LICENSE-2.0](https://www.apache.org/licenses/LICENSE-2.0)
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
