DynamoDB Dynomite General Low-Level Client Wrappers
Low-Level Client Wrapper Methods
The scan and query are low-level methods corresponding to the raw DynamoDB Client methods. They add some conveniences:
- add the
table_nameto the params - return model items instances like
Productinstead of a raw item fromresp.table.items.
Scan
products = Product.scan(
filter_expression: "#name IN (:name1, :name2)",
expression_attribute_names: {"#name"=>"name"},
expression_attribute_values: {":name1"=>"Smartphone",":name2"=>"Laptop"},
)
products # Array of Product items. [<Product>, <Product>, ...]
Query
products = Product.query(
index_name: "category-name-index",
expression_attribute_names: {"#category"=>"category", "#name"=>"name"},
expression_attribute_values: {":category"=>"Books", ":name"=>"Novel"},
key_condition_expression: "#category = :category AND #name = :name",
)
products # Array of Product items. [<Product>, <Product>, ...]
Here are a few more low-level examples.
Even Lower-Level Client
If you want to use direct aws-sdk-dynamodb client directly. It’s available via client.
❯ jets console
> Product.client
=> #<Aws::DynamoDB::Client>
>
You have access to all the raw underlying aws-sdk-dynamodb methods. With the raw client, you need to specify the table name and convert the raw items response to a model object.