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Undid previous change which violated the convention regarding output (use "# =>") used in these guides. Corrected typo in previous correction. (Thanks for pointing this out, vijaydev.)
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1 changed files with 13 additions and 13 deletions
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@ -87,7 +87,7 @@ Using <tt>Model.find(primary_key)</tt>, you can retrieve the object correspondin
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<ruby>
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# Find the client with primary key (id) 10.
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client = Client.find(10)
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=> #<Client id: 10, first_name: "Ryan">
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# => #<Client id: 10, first_name: "Ryan">
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</ruby>
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The SQL equivalent of the above is:
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@ -104,7 +104,7 @@ h5. +first+
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<ruby>
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client = Client.first
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=> #<Client id: 1, first_name: "Lifo">
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# => #<Client id: 1, first_name: "Lifo">
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</ruby>
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The SQL equivalent of the above is:
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@ -121,7 +121,7 @@ h5. +last+
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<ruby>
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client = Client.last
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=> #<Client id: 221, first_name: "Russel">
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# => #<Client id: 221, first_name: "Russel">
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</ruby>
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The SQL equivalent of the above is:
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@ -138,7 +138,7 @@ h5(#first_1). +first!+
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<ruby>
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client = Client.first!
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=> #<Client id: 1, first_name: "Lifo">
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# => #<Client id: 1, first_name: "Lifo">
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</ruby>
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The SQL equivalent of the above is:
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@ -155,7 +155,7 @@ h5(#last_1). +last!+
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<ruby>
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client = Client.last!
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=> #<Client id: 221, first_name: "Russel">
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# => #<Client id: 221, first_name: "Russel">
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</ruby>
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The SQL equivalent of the above is:
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@ -175,7 +175,7 @@ h5. Using Multiple Primary Keys
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<ruby>
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# Find the clients with primary keys 1 and 10.
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client = Client.find([1, 10]) # Or even Client.find(1, 10)
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=> [#<Client id: 1, first_name: "Lifo">, #<Client id: 10, first_name: "Ryan">]
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# => [#<Client id: 1, first_name: "Lifo">, #<Client id: 10, first_name: "Ryan">]
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</ruby>
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The SQL equivalent of the above is:
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@ -252,7 +252,7 @@ Invoice.find_in_batches(:include => :invoice_lines) do |invoices|
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end
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</ruby>
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The above will each time yield to the supplied block an arrays of 1000 invoices (or the remaining invoices, if less than 1000).
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The above will each time yield to the supplied block an array of 1000 invoices (or the remaining invoices, if less than 1000).
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NOTE: The +:include+ option allows you to name associations that should be loaded alongside with the models.
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@ -1032,7 +1032,7 @@ Suppose you want to find a client named 'Andy', and if there's none, create one
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<ruby>
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Client.where(:first_name => 'Andy').first_or_create(:locked => false)
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=> #<Client id: 1, first_name: "Andy", orders_count: 0, locked: false, created_at: "2011-08-30 06:09:27", updated_at: "2011-08-30 06:09:27">
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# => #<Client id: 1, first_name: "Andy", orders_count: 0, locked: false, created_at: "2011-08-30 06:09:27", updated_at: "2011-08-30 06:09:27">
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</ruby>
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The SQL generated by this method looks like this:
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@ -1070,7 +1070,7 @@ to your +Client+ model. If you try to create a new +Client+ without passing an +
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<ruby>
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Client.where(:first_name => 'Andy').first_or_create!(:locked => false)
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=> ActiveRecord::RecordInvalid: Validation failed: Orders count can't be blank
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# => ActiveRecord::RecordInvalid: Validation failed: Orders count can't be blank
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</ruby>
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h4. +first_or_initialize+
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@ -1079,13 +1079,13 @@ The +first_or_initialize+ method will work just like +first_or_create+ but it wi
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<ruby>
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nick = Client.where(:first_name => 'Nick').first_or_initialize(:locked => false)
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=> <Client id: nil, first_name: "Nick", orders_count: 0, locked: false, created_at: "2011-08-30 06:09:27", updated_at: "2011-08-30 06:09:27">
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# => <Client id: nil, first_name: "Nick", orders_count: 0, locked: false, created_at: "2011-08-30 06:09:27", updated_at: "2011-08-30 06:09:27">
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nick.persisted?
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=> false
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# => false
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nick.new_record?
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=> true
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# => true
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</ruby>
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Because the object is not yet stored in the database, the SQL generated looks like this:
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@ -1098,7 +1098,7 @@ When you want to save it to the database, just call +save+:
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<ruby>
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nick.save
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=> true
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# => true
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</ruby>
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h3. Finding by SQL
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