# Indexing Documents¶

Elasticsearch accepts documents in the form of JSON. In elasticsearch-lua documents are passed as Lua tables. There are several ways to index documents.

## Indexing Single Document¶

To index a document, you need to pass index and type as parameters. The document to be indexed is passed as a Lua table using the body parameter. Optionally, you can also provide an id for the document or let Elasticsearch generate it for you.

local res, status = client:index{
index = "my_index",
type = "my_type",
id = "my_id",            -- Optional
body = {
my_key = "my_value"
}
}


You can specify additional parameters such as routing, refresh, etc. alongside index, type.

local res, status = client:index{
index = "my_index",
type = "my_type",
id = "my_id",            -- Optional
routing = "company_xyz", -- Optional
body = {
my_key = "my_value"
}
}


Refer to the Elasticsearch documentation for a complete list of allowed parameters.

## Indexing Bulk Documents¶

Elasticsearch also supports bulk indexing of documents (indexing more than one document in one HTTP request). It is advised to use the Bulk API if you have to index many documents together. The client accepts an array of tables. You have to specify a pair of tables for every document. The first represents an action(‘index’) in this context and the second represents the body. So basically the array consists of action, body, action, body, etc. tables.

local res, status = client:bulk{
body = {
-- First action
{
index = {
["_index"] = "my_index1",
["_type"] = "my_type1"
}
},
-- First body
{
my_key1 = "my_value1",
},
-- Second action
{
index = {
["_index"] = "my_index2",
["_type"] = "my_type2"
}
},
-- Second body
{
my_key2 = "my_value2",
}
}
}


You can also specify a common index or a type separately that would be used as default in every action.

local res, status = client:bulk{
index = "my_index",
body = {
-- First action
{
index = {
["_type"] = "my_type1"
}
},
-- First body
{
my_key1 = "my_value1",
},
-- Second action
{
index = {
["_type"] = "my_type2"
}
},
-- Second body
{
my_key2 = "my_value2",
}
}
}