Class: Json2sql::DeleteRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/json2sql/delete_runner.rb

Overview

Builds one or more DELETE statements from a Hash of table → params.

Usage (single deletion):

sql = Json2sql::DeleteRunner.build(
  "users" => { "and" => { "id" => 42 } }
)

Usage (multiple deletions — value is an Array):

sql = Json2sql::DeleteRunner.build(
  "sessions" => [
    { "and" => { "user_id" => 1 } },
    { "and" => { "user_id" => 2 } }
  ]
)

Class Method Summary collapse

Class Method Details

.build(input) ⇒ Object 



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# File 'lib/json2sql/delete_runner.rb', line 20

def self.build(input)

  sql = +""
  
  input = Json2sql.normalize(input)

  relation = WhereRelation.none("")

  input.each do |table, value|

    tbl = table.to_s

    case value

    when Hash

      DeleteModel.new(sql, tbl, relation).build(value)

      sql << ";\n"

    when Array

      value.each do |item|

        next unless item.is_a?(Hash)

        DeleteModel.new(sql, tbl, relation).build(item)
        
        sql << ";\n"
      end
    end
  end

  sql
end