82 lines
3 KiB
Clojure
82 lines
3 KiB
Clojure
(ns examples.basic_operations
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(:gen-class)
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(:require [monger core collection util])
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(:import (com.mongodb Mongo DB DBObject))
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(:use [clojure.tools.cli]))
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(defn fix-paul-maccartneys-name
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"Fix Paul McCartney's name"
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[]
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(let [ paul_mccartney (monger.collection/find-one "people" { :first_name "Raul" }) ]
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))
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(do
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(let [
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args *command-line-args*
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parsed-args (cli args
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["--port" "Mongodb port" :default 27017]
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["--host" "Mongodb host" :default "127.0.0.1"]
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["--db-name" :default "monger-example"]) ]
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(monger.core/connect! (first parsed-args))
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(monger.core/set-db! (monger.core/get-db "monger-example"))
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(println "Does people connection exist: " (monger.collection/exists? "people"))
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;; Insert a record to people collection
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(monger.collection/insert "people" { :first_name "John" :last_name "Lennon" })
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;; Count an amount of records just inserted
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(println "People collection is: " (monger.collection/count "people"))
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;; Insert several records
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(monger.collection/insert-batch "people" [{ :first_name "Ringo" :last_name "Starr" }
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{ :first_name "Raul" :last_name "McCartney" }
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{ :first_name "George" :last_name "Harrison" } ])
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(println "People collection is: " (monger.collection/count "people"))
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;; Fix a typo in the inserted record
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(monger.collection/update "people" { :first_name "Raul" } { "$set" { :first_name "Paul" } })
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(println (monger.collection/find-one-as-map "people" { :first_name "Paul" }))
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;; Now, let's add the index to that record
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(monger.collection/update "people" { :first_name "Paul" } { "$set" { :years_on_stage 1 } })
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(println (monger.collection/find-one-as-map "people" { :first_name "Paul" }))
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;; Increment record 45 times
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(dotimes [n 45]
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(monger.collection/update "people" { :first_name "Paul" } { "$inc" { :years_on_stage 1 } })
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(println (monger.collection/find-one-as-map "people" { :first_name "Paul" }))
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)
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;; Remove years_on_stage field
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(monger.collection/update "people" { :first_name "Paul" } { "$unset" { :years_on_stage 1} })
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;; Insert the record to the data set if it wasn't there yet
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(monger.collection/update "people" { :first_name "Yoko" } { :first_name "Yoko" :last_name "Ono" } :upsert true)
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;; Update multiple records
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(monger.collection/update "people" { } { "$set" { :band "The Beatles" }} :multi true)
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;; Save can act both like insert and update
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(def ian_gillian
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(monger.conversion/to-db-object
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{ :first_name "Ian" :last_name "Gillan" }))
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;; Performs insert
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(monger.collection/save "people" ian_gillian)
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;; Performs update
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(monger.collection/save "people"
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{ :_id (monger.util/get-id ian_gillian)
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:first_name "Ian"
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:last_name "Gillan" :band "Deep Purple" })
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;; Remove people collection
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(monger.collection/drop "people")
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))
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