class Marten::DB::Query::RawSet(M)

Overview

Represents a raw query set.

A raw query set allows to easily map the results of a raw SQL statement into corresponding model instances and allows to iterate over them (like a regular query set).

Included Modules

Enumerable(M)

Defined in:

marten/db/query/raw_set.cr

Constructors

.new(query : String, params : Array(::DB::Any) | Hash(String, ::DB::Any), using : String | Nil)
.new(query : Marten::DB::Query::SQL::RawQuery(M) = SQL::RawQuery(M).new)

Instance Method Summary

#[](index : Int)
Returns the record at the given index.
#[](range : Range)
Returns the records corresponding to the passed range.
#[]?(index : Int)
Returns the record at the given index.
#[]?(range : Range)
Returns the records corresponding to the passed range.
#count
Returns the number of records that are targeted by the current raw query set.
#each(&)
Allows to iterate over the records that are targeted by the current query set.
#size
Returns the number of records that are targeted by the current raw query set.
#using(db : Nil | String | Symbol)
Allows to define which database alias should be used when evaluating the raw query set.

Constructor Detail

def self.new(query : String, params : Array(::DB::Any) | Hash(String, ::DB::Any), using : String | Nil) #

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def self.new(query : Marten::DB::Query::SQL::RawQuery(M) = SQL::RawQuery(M).new) #

[View source]

Instance Method Detail

def [](index : Int) #

Returns the record at the given index.

If no record can be found at the given index, then an IndexError exception is raised.

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def [](range : Range) #

Returns the records corresponding to the passed range.

If no records match the passed range, an IndexError exception is raised.

[View source]

def []?(index : Int) #

Returns the record at the given index.

nil is returned if no record can be found at the given index.

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def []?(range : Range) #

Returns the records corresponding to the passed range.

nil is returned if no records match the passed range.

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def count #

Returns the number of records that are targeted by the current raw query set.

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def each(&) #

Allows to iterate over the records that are targeted by the current query set.

This method can be used to define a block that iterates over the records that are targeted by a query set:

Post.all.each do |post|
  # Do something
end

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def size #

Returns the number of records that are targeted by the current raw query set.

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def using(db : Nil | String | Symbol) #

Allows to define which database alias should be used when evaluating the raw query set.

[View source]