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scripted-updates.md

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Scripted updates

Reducing the current value of in_stock by one

POST /products/_update/100
{
  "script": {
    "source": "ctx._source.in_stock--"
  }
}

Assigning an arbitrary value to in_stock

POST /products/_update/100
{
  "script": {
    "source": "ctx._source.in_stock = 10"
  }
}

Using parameters within scripts

POST /products/_update/100
{
  "script": {
    "source": "ctx._source.in_stock -= params.quantity",
    "params": {
      "quantity": 4
    }
  }
}

Conditionally setting the operation to noop

POST /products/_update/100
{
  "script": {
    "source": """
      if (ctx._source.in_stock == 0) {
        ctx.op = 'noop';
      }
      
      ctx._source.in_stock--;
    """
  }
}

Conditionally update a field value

POST /products/_update/100
{
  "script": {
    "source": """
      if (ctx._source.in_stock > 0) {
        ctx._source.in_stock--;
      }
    """
  }
}

Conditionally delete a document

POST /products/_update/100
{
  "script": {
    "source": """
      if (ctx._source.in_stock < 0) {
        ctx.op = 'delete';
      }
      
      ctx._source.in_stock--;
    """
  }
}