laniu
Laniu can help you rapid development and clean.
It’s django model for clojure.
A Clojure library designed to normal human that don't like SQL, well, if you don't like SQL , that part is up to you.
I use this lib for my work everyday, so I'm the first user, I try my best to make it better everyday.
PS. connection pooling change to hikari-cp library now.
Leiningen/Boot
Dependency Information
Requires Clojure 1.9 or later!
And I Just test mysql 5.7.20 now, It will support more database later.
Usage
(require '[laniu.core :refer :all])
(require '[laniu.db :as laniu-db])config the database connection
(defdb
{:default {:adapter "mysql"
:username "root"
:password "123"
:database-name "projectx2"
:server-name "localhost"
:port-number 3306
:use-ssl false
}})or save the config to file settings.edn, laniu will auto load the config data and connection.
Multiple databases
This setting maps database aliases, which are a way to refer to a specific database throughout query, to a dictionary of settings for that specific connection.
(defdb
{:default {:adapter "mysql"
:username "root"
:password "123"
:database-name "projectx2"
:server-name "localhost"
:port-number 3306}
:read-db {:adapter "mysql"
:username "root"
:password "123"
:database-name "projectx3"
:server-name "localhost"
:port-number 3306
:read-only true}})
; the default read and write
; the default database engine is InnoDB
; the default database charset is utf8
; defdb by database engine and charset
(defdb
{:default {:adapter "mysql"
:username "root"
:password "123"
:database-name "projectx2"
:server-name "localhost"
:port-number 3306
:engine "InnoDB"
:charset "utf8"
:use-ssl false}})The more detail about the database connection config is here https://github.com/tomekw/hikari-cp
define a model
(defmodel Publisher
:fields {:name {:type :char-field :max-length 60}}
:meta {:db_table "ceshi_publisher"})
(defmodel reporter
:fields {:full_name {:type :char-field :max-length 70}}
:meta {:db_table "ceshi_reporter"})
; the database sql, the model will auto add a primary key :id
; create table
(laniu-db/create-table reporter :debug? true)
CREATE TABLE `ceshi_reporter` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`full_name` varchar(70) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
(defmodel category
:fields {:name {:type :char-field :max-length 30}
:sort_order {:type :int-field :default 0}}
:meta {:db_table "ceshi_category"})
(laniu-db/create-table category :debug? true)
CREATE TABLE `ceshi_category` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(30) NOT NULL,
`sort_order` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
(defmodel article
:fields {:headline {:type :char-field :max-length 200}
:content {:type :text-field}
:view_count {:type :int-field :default 0}
:reporter {:type :foreignkey :model reporter :on-delete :cascade}
:category {:type :foreignkey :model category :on-delete :set-null :blank true}
:created {:type :int-field :default #(quot (System/currentTimeMillis) 1000)}}
:meta {:db_table "ceshi_article"})
CREATE TABLE `ceshi_article` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`headline` varchar(200) NOT NULL,
`content` longtext NOT NULL,
`reporter_id` int(11) NOT NULL,
`view_count` int(11) NOT NULL,
`category_id` int(11) DEFAULT NULL,
`created` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `ceshi_article_reporter_id_45762308_fk_ceshi_reporter_id` (`reporter_id`),
KEY `ceshi_article_category_id_dc75abf4_fk_ceshi_category_id` (`category_id`),
CONSTRAINT `ceshi_article_category_id_dc75abf4_fk_ceshi_category_id` FOREIGN KEY (`category_id`) REFERENCES `ceshi_category` (`id`),
CONSTRAINT `ceshi_article_reporter_id_45762308_fk_ceshi_reporter_id` FOREIGN KEY (`reporter_id`) REFERENCES `ceshi_reporter` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
; foreignkey to self
(defmodel tree
:fields {:name {:type :char-field :max-length 30}
:parent {:type :foreignkey :model :self}
:sort-order {:type :int-field :default 0}
})
CREATE TABLE `ceshi_tree` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(30) NOT NULL,
`sort_order` int(11) NOT NULL,
`parent_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `ceshi_tree_parent_id_c2f9831f_fk_ceshi_tree_id` (`parent_id`),
CONSTRAINT `ceshi_tree_parent_id_c2f9831f_fk_ceshi_tree_id` FOREIGN KEY (`parent_id`) REFERENCES `ceshi_tree` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8when you define a model , It's automatic create the data spec.
insert data
If the field has :default config, It will auto fill the default value to the field.
(insert! reporter :values {:full_name "edison"})
;=> 45
(insert! reporter :values {:full_name "chris"})
;=> 46
(insert! category :values {:name "IT" :sort_order 1})
;=> 9
(insert! category :values {:name "Movie" :sort_order 2})
;=> 10
; add :debug? true will print the sql info
(insert! category :values {:name "Fun" :sort_order 3} :debug? true)
"insert data to db " :ceshi_category " : " {"ceshi_category.name" "Fun", "ceshi_category.sort_order" 3}
;=> 11insert with default value
:created field and :view_count field will auto fill the default value
(insert! article
:values {:headline "just a test"
:content "hello world"
:reporter 45
:category 11})
; => 6insert wrong data with spec error
When you define a model, the defmodel will auto define a data spec, when you insert data or update data, the spec will valid the data.
(insert! reporter :values {:full_name2 "chris"})
;=>
{:full_name2 "chris"} - failed: (contains? % :full_name) spec: :laniu.core-test/reporter
(insert! category :values {:name "Flower" :sort_order "a"})
;=>
"a" - failed: int? in: [:sort_order] at: [:sort_order] spec: :laniu.core-test.category/sort_order
field with choices valid
(defmodel user
:fields {
:first-name {:type :char-field :verbose-name "First name" :max-length 30}
:last-name {:type :char-field :verbose-name "Last name" :max-length 30}
:gender {:type :tiny-int-field :verbose-name "Gender" :choices [[0, "uninput"], [1, "Male"], [2, "Female"]] :default 0}
:created {:type :int-field :verbose-name "Created" :default #(quot (System/currentTimeMillis) 1000)}
})
(insert! user
:values {:first-name "Edison"
:last-name "Rao"
:gender 4})
;=>
4 - failed: (contains? {0 "uninput", 1 "Male", 2 "Female"} %) in: [:gender] at: [:gender] spec: :laniu.core-test.user/gender
insert multi rows
(insert-multi! article
:values [{:headline "Apple make a phone"
:content "bala babla ...."
:reporter 46
:category 9}
{:headline "A good movie recommend"
:content "bala babla ...."
:reporter 45
:category 10}
{:headline "A funny joke"
:content "bala babla ...."
:reporter 46
:category 11}
])
;=> (7 8 9)
update data
; update
(update! reporter
:values {:full_name "Edison Rao"}
:where [:id 45])
; => 1
; update with multi conditions
(update! reporter
:values {:full_name "Chris Zheng"}
:where [:id 46 :full_name "chris"]
:debug? true)
["update ceshi_reporter set ceshi_reporter.full_name=? where ceshi_reporter.id= ? and ceshi_reporter.full_name= ?" "Chris Zheng" 46 "chris"]
; => 1
; update value , search with foreignkey model
(update! article
:values {:reporter 1}
:where [:category.name "IT"])
; => 1
(update! article
:values {:category 9 :reporter 45}
:where [:id 7])
; => 1update with function
(update! article
:values {:view_count `(+ :view_count 10)})
(def a 30)
(update! article
:values {:view_count `(* :view_count ~a)}
:where [:id 7])
; update with more complex raq sql
(update! article
:values {:view_count `(rawsql "view_count+id")}
:debug? true)
["update ceshi_article set ceshi_article.view_count=(view_count+id) "]
update or insert
(update-or-insert! Publisher :values {:name "Yunnan"} :where [:id 1])
; {:update-count 1}get or insert
(get-or-insert! Publisher :values {:name "Yunnan"} :where [:id 1])
; get one
; {:name "Yunnan", :id 1}
(get-or-insert! Publisher :values {:name "Alice in Wonderland"} :where [:name "Alice in Wonderland"])
; not found and insert!
{:id {:generated_key 156}}select data
; select
(select category)
; =>
({:id 1, :name "aaa", :sort_order 0}
{:id 2, :name "bbb", :sort_order 0}
{:id 3, :name "ccc", :sort_order 0}
{:id 4, :name "ccc", :sort_order 0}
{:id 5, :name "aaa", :sort_order 0}
{:id 6, :name "bbb", :sort_order 0}
{:id 7, :name "ccc", :sort_order 0}
{:id 8, :name "IT news", :sort_order 1}
{:id 9, :name "IT", :sort_order 1}
{:id 10, :name "Movie", :sort_order 2}
{:id 11, :name "Fun", :sort_order 3}
{:id 12, :name "IT", :sort_order 1}
{:id 13, :name "Fun", :sort_order 3})
;select with condition
(select category
:fields [:id :name]
:where [:name "IT"]
)
;=>
({:id 9, :name "IT"} {:id 12, :name "IT"})
select with field alias
(select category
:fields [:id [:name :category_name]]
:where [:name "IT"]
:debug? true
)
["select ceshi_category.id, ceshi_category.name as category_name from ceshi_category where ceshi_category.name= ?" "IT"]
;=>
({:id 9, :category_name "IT"} {:id 12, :category_name "IT"})select with or, and, not
The default is and
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where [:category.name "IT" :reporter.full_name "Edison Rao"]
:debug? true
)
["select ceshi_article.id, ceshi_article.headline, ceshi_category.name, ceshi_reporter.full_name from ceshi_article INNER JOIN ceshi_reporter ON (ceshi_article.reporter_id = ceshi_reporter.id) INNER JOIN ceshi_category ON (ceshi_article.category_id = ceshi_category.id) where ceshi_category.name= ? and ceshi_reporter.full_name= ?" "IT" "Edison Rao"]
=>
({:id 7, :headline "Apple make a phone", :name "IT", :full_name "Edison Rao"})
;It's the same to
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `(and :category.name "IT" :reporter.full_name "Edison Rao")
:debug? true
)
["select ceshi_article.id, ceshi_article.headline, ceshi_category.name, ceshi_reporter.full_name from ceshi_article INNER JOIN ceshi_reporter ON (ceshi_article.reporter_id = ceshi_reporter.id) INNER JOIN ceshi_category ON (ceshi_article.category_id = ceshi_category.id) where (ceshi_category.name= ? and ceshi_reporter.full_name= ?)" "IT" "Edison Rao"]
=>
({:id 7, :headline "Apple make a phone", :name "IT", :full_name "Edison Rao"})with or
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `(or :category.name "IT" :reporter.full_name "Edison Rao")
:debug? true
)
["select ceshi_article.id, ceshi_article.headline, ceshi_category.name, ceshi_reporter.full_name from ceshi_article INNER JOIN ceshi_reporter ON (ceshi_article.reporter_id = ceshi_reporter.id) INNER JOIN ceshi_category ON (ceshi_article.category_id = ceshi_category.id) where (ceshi_category.name= ? or ceshi_reporter.full_name= ?)" "IT" "Edison Rao"]
=>
({:id 7, :headline "Apple make a phone", :name "IT", :full_name "Edison Rao"}
{:id 13, :headline "just a test", :name "Fun", :full_name "Edison Rao"}
{:id 14, :headline "Apple make a phone", :name "IT", :full_name "aaa"}
{:id 15, :headline "A good movie recommend", :name "Movie", :full_name "Edison Rao"})with and & or
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `(or [:category.name "IT" :reporter.full_name "Edison Rao"] [:category.name "Fun" :reporter.full_name "Chris Zheng"])
:debug? true
)
["select ceshi_article.id, ceshi_article.headline, ceshi_category.name, ceshi_reporter.full_name from ceshi_article INNER JOIN ceshi_reporter ON (ceshi_article.reporter_id = ceshi_reporter.id) INNER JOIN ceshi_category ON (ceshi_article.category_id = ceshi_category.id) where (ceshi_category.name= ? and ceshi_reporter.full_name= ?) or (ceshi_category.name= ? and ceshi_reporter.full_name= ?)" "IT" "Edison Rao" "Fun" "Chris Zheng"]
=>
({:id 7, :headline "Apple make a phone", :name "IT", :full_name "Edison Rao"}
{:id 16, :headline "A funny joke", :name "Fun", :full_name "Chris Zheng"})
;It's the same to
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `(or (and :category.name "IT" :reporter.full_name "Edison Rao") (and :category.name "Fun" :reporter.full_name "Chris Zheng"))
:debug? true
)
; another and/or select
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `(and (or :category.name "IT" :reporter.full_name "Edison Rao") (or :category.name "Fun" :reporter.full_name "Chris Zheng"))
:debug? true
)
["select ceshi_article.id, ceshi_article.headline, ceshi_category.name, ceshi_reporter.full_name from ceshi_article INNER JOIN ceshi_reporter ON (ceshi_article.reporter_id = ceshi_reporter.id) INNER JOIN ceshi_category ON (ceshi_article.category_id = ceshi_category.id) where (ceshi_category.name= ? or ceshi_reporter.full_name= ?) and (ceshi_category.name= ? or ceshi_reporter.full_name= ?)" "IT" "Edison Rao" "Fun" "Chris Zheng"]
=> ({:id 13, :headline "just a test", :name "Fun", :full_name "Edison Rao"})
;It's same to
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `[(or :category.name "IT" :reporter.full_name "Edison Rao") (or :category.name "Fun" :reporter.full_name "Chris Zheng")]
:debug? true
)with not, not only can contains one collection. (not [:id 1 :headline "xxx"])
(select article :where `(not [:id 1]) :debug? true)
["select * from ceshi_article where not (ceshi_article.id= ?)" 1]
(select article
:fields [:id :headline :category.name :reporter.full_name]
:where `(not [(or :category.name "IT" :reporter.full_name "Edison Rao") (or :category.name "Fun" :reporter.full_name "Chris Zheng")])
:debug? true
)
["select ceshi_article.id, ceshi_article.headline, ceshi_category.name, ceshi_reporter.full_name from ceshi_article INNER JOIN ceshi_reporter ON (ceshi_article.reporter_id = ceshi_reporter.id) INNER JOIN ceshi_category ON (ceshi_article.category_id = ceshi_category.id) where not ((ceshi_category.name= ? or ceshi_reporter.full_name= ?) and (ceshi_category.name= ? or ceshi_reporter.full_name= ?))" "IT" "Edison Rao" "Fun" "Chris Zheng"]select foreignkey field
(select article
:fields [:id :headline :category.name]
:where [:id 7])
; =>
({:id 7, :headline "Apple make a phone", :name "IT"})
; select with multi foeinkey field
(select article
:fields [:id :headline :category.name [:reporter.full_name :reporter_full_name]]
:where [:id 7])
;=>
({:id 7, :headline "Apple make a phone", :name "IT", :reporter_full_name "Edison Rao"})
; You also can filter from category to article
(select category :where [:article.headline "ccc"] :debug? true)
["select * from ceshi_category INNER JOIN ceshi_article ON (ceshi_category.id = ceshi_article.category_id) where ceshi_article.headline= ?" "A funny joke"]select foreignkey condition
; select with foreignkey condition
(select article
:fields [:id :headline :content :category.name [:reporter.full_name :reporter_full_name]]
:where [:category.name "IT"])
;=>
({:id 7, :headline "Apple make a phone", :content "bala babla ....", :name "IT", :reporter_full_name "Edison Rao"}
{:id 14, :headline "Apple make a phone", :content "bala babla ....", :name "IT", :reporter_full_name "aaa"})
(select article
:fields [:id :headline :content :category.name :reporter.full_name]
:where [:category.name "IT" :reporter.full_name "Edison Rao"])
; =>
({:id 7, :headline "Apple make a phone", :content "bala babla ....", :name "IT", :full_name "Edison Rao"})
select many-to-many-field
(defmodel Publisher
:fields {:name {:type :char-field :max-length 60}}
:meta {:db_table "ceshi_publisher"})
CREATE TABLE `ceshi_publisher` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(300) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
(defmodel Author
:fields {:name {:type :char-field :max-length 100}
:age {:type :int-field}}
:meta {:db_table "ceshi_author"})
CREATE TABLE `ceshi_author` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(100) NOT NULL,
`age` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
(defmodel Book
:fields {:name {:type :char-field :max-length 60}
:pages {:type :int-field}
:price {:type :float-field :default 0}
:rating {:type :tiny-int-field :choices [[-1 "unrate"] [0 "0 star"] [1 "1 star"] [2 "2 star"] [3 "3 star"] [4 "4 star"] [5 "5 star"]]}
:authors {:type :many-to-many-field :model Author :through-db "ceshi_book_authors" :through-field-columns ["book_id" "author_id"]}
:publisher {:type :foreignkey :model Publisher :related-name :book}
:pubdate {:type :int-field}}
:meta {:db_table "ceshi_book"})
CREATE TABLE `ceshi_book` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(300) NOT NULL,
`pages` int(11) NOT NULL,
`price` decimal(10,2) NOT NULL,
`rating` double NOT NULL,
`pubdate` int(11) NOT NULL,
`publisher_id` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `ceshi_book_publisher_id_7564e663_fk_ceshi_publisher_id` (`publisher_id`),
CONSTRAINT `ceshi_book_publisher_id_7564e663_fk_ceshi_publisher_id` FOREIGN KEY (`publisher_id`) REFERENCES `ceshi_publisher` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
CREATE TABLE `ceshi_book_authors` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`book_id` int(11) NOT NULL,
`author_id` int(11) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ceshi_book_authors_book_id_author_id_66920651_uniq` (`book_id`,`author_id`),
KEY `ceshi_book_authors_author_id_86478fd9_fk_ceshi_author_id` (`author_id`),
CONSTRAINT `ceshi_book_authors_author_id_86478fd9_fk_ceshi_author_id` FOREIGN KEY (`author_id`) REFERENCES `ceshi_author` (`id`),
CONSTRAINT `ceshi_book_authors_book_id_8f05f3f8_fk_ceshi_book_id` FOREIGN KEY (`book_id`) REFERENCES `ceshi_book` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
(select Book :where [:authors.name "Chris Zheng"] :debug? true)
["select ceshi_book.pubdate, ceshi_book.publisher_id, ceshi_book.name, ceshi_book.pages, ceshi_book.id, ceshi_book.price, ceshi_book.rating from ceshi_book INNER JOIN ceshi_book_authors ON (ceshi_book.id = ceshi_book_authors.book_id) INNER JOIN ceshi_author ON (ceshi_book_authors.author_id = ceshi_author.id) where ceshi_author.name= ?" "Chris Zheng"]
(select Author :where [:book.name "Living Clojure"] :debug? true)
["select ceshi_author.age, ceshi_author.name, ceshi_author.id from ceshi_author INNER JOIN ceshi_book_authors ON (ceshi_author.id = ceshi_book_authors.author_id) INNER JOIN ceshi_book ON (ceshi_book_authors.book_id = ceshi_book.id) where ceshi_book.name= ?" "Living Clojure"]
; many to many annotate
(select Author :annotate [`(count :book)] :debug? true)
["select ceshi_author.age, ceshi_author.name, ceshi_author.id, count(ceshi_book.id) as count__book from ceshi_author LEFT JOIN ceshi_book_authors ON (ceshi_author.id = ceshi_book_authors.author_id) LEFT JOIN ceshi_book ON (ceshi_book_authors.book_id = ceshi_book.id) group by ceshi_author.id"]
(select Book :annotate [`(count :authors)] :debug? true)
["select ceshi_book.pubdate, ceshi_book.publisher_id, ceshi_book.name, ceshi_book.pages, ceshi_book.id, ceshi_book.price, ceshi_book.rating, count(ceshi_author.id) as count__authors from ceshi_book LEFT JOIN ceshi_book_authors ON (ceshi_book.id = ceshi_book_authors.book_id) LEFT JOIN ceshi_author ON (ceshi_book_authors.author_id = ceshi_author.id) group by ceshi_book.id"]select with function
; select with function
(select article
:where [:id `(> 7)])
(select article
:where [:id `(not= 7)]
:debug? true)
["select * from ceshi_article where ceshi_article.id <> ?" 7]
(select article
:where [:id `(in [6 7 8])]
:debug? true)
["select * from ceshi_article where ceshi_article.id in (?,?,?)" 6 7 8]
(select article
:where [:headline `(startswith "a")]
:debug? true)
["select * from ceshi_article where ceshi_article.headline like ?" "a%"]
; you can also use original sql function with rawsql
(select article
:where [:id `(rawsql "in (6,7,8)")]
:debug? true)
["select * from ceshi_article where ceshi_article.id in (6,7,8)"]
; or
(select article
:where [:id `(rawsql "in (?,?,?)" [6 7 8])]
:debug? true)
["select * from ceshi_article where ceshi_article.id in (?,?,?)" 6 7 8]order by
(select article
:where [:id `(> 7)]
:order-by [:id])
["select ceshi_article.category_id, ceshi_article.view_count, ceshi_article.headline, ceshi_article.content, ceshi_article.created, ceshi_article.reporter_id, ceshi_article.id from ceshi_article where ceshi_article.id > ? order by ceshi_article.id asc" 7]
(select article
:where [:id `(> 7)]
:order-by [:-id]
:debug? true)
["select ceshi_article.category_id, ceshi_article.view_count, ceshi_article.headline, ceshi_article.content, ceshi_article.created, ceshi_article.reporter_id, ceshi_article.id from ceshi_article where ceshi_article.id > ? order by ceshi_article.id desc" 7]limit
(select article
:where [:id `(> 7)]
:limit 3
:order-by [:id])
or
(select article
:where [:id `(> 7)]
:limit [3]
:order-by [:id])
["select ceshi_article.category_id, ceshi_article.view_count, ceshi_article.headline, ceshi_article.content, ceshi_article.created, ceshi_article.reporter_id, ceshi_article.id from ceshi_article where ceshi_article.id > ? order by ceshi_article.id asc limit 3" 7]
(select article
:where [:id `(> 7)]
:limit [3, 7]
:order-by [:id]
:debug? true)
["select ceshi_article.category_id, ceshi_article.view_count, ceshi_article.headline, ceshi_article.content, ceshi_article.created, ceshi_article.reporter_id, ceshi_article.id from ceshi_article where ceshi_article.id > ? order by ceshi_article.id asc limit 3,7" 7]get-one
(get-one article :where [:id 7] :debug? true)
["select ceshi_article.category_id, ceshi_article.view_count, ceshi_article.headline, ceshi_article.content, ceshi_article.created, ceshi_article.reporter_id, ceshi_article.id from ceshi_article where ceshi_article.id= ? limit 1" 7]
{:category_id 9,
:view_count 30,
:headline "Apple make a phone",
:content "bala babla ....",
:created 1546750837,
:reporter_id 45,
:id 7}delete data
(delete! article :where [:id 3])aggregate
Returns the aggregate values (avg, sum, count, min, max), the aggregate field will return count__id, max__view_count.
(select article
:aggregate `[(count :id) (max :view_count) (min :view_count) (avg :view_count) (sum :view_count)]
:debug? true)
["select count(ceshi_article.id) as count__id, max(ceshi_article.view_count) as max__view_count, min(ceshi_article.view_count) as min__view_count, avg(ceshi_article.view_count) as avg__view_count, sum(ceshi_article.view_count) as sum__view_count from ceshi_article "]
=> ({:count__id 13, :max__view_count 600, :min__view_count 20, :avg__view_count 67.6923M, :sum__view_count 880M})
; with alias
(select article
:aggregate `[[(count :id) :count_id] [(max :view_count) :max_view_count]]
:debug? true)
["select count(ceshi_article.id) as count_id, max(ceshi_article.view_count) as max_view_count from ceshi_article"]
=> ({:count_id 13, :max_view_count 600})Example from django aggregation
; Total number of books with publisher=BaloneyPress
(select Book :where [:publisher.name "BaloneyPress"]
:aggregate `[(count *)]
:debug? true
)
["select count(*) as count from ceshi_book INNER JOIN ceshi_publisher ON (ceshi_book.publisher_id = ceshi_publisher.id) where ceshi_publisher.name= ?" "BaloneyPress"]
; Average price across all books.
(select Book
:aggregate `[(avg :price)]
:debug? true
)
["select avg(ceshi_book.price) as avg__price from ceshi_book"]Annotate
(select category :annotate `[[(count :article) :article_count]] :debug? true)
["select ceshi_category.name, ceshi_category.sort_order, ceshi_category.id, count(ceshi_article.id) as article_count from ceshi_category INNER JOIN ceshi_article ON (ceshi_category.id = ceshi_article.category_id) group by ceshi_category.id"]run raw sql
If you need a more complex form of sql, you can use raw-query and raw-execute!, the jdbc sql document at here http://clojure-doc.org/.../java_jdbc/using_sql.html
raw-query for select
(raw-query ["SELECT * FROM ceshi_article where id=?" 15])
(raw-query ["SELECT * FROM ceshi_reporter where id=?" 15] {:as-arrays? true})raw-execute! for insert, update, delete ...
(raw-execute! ["update ceshi_article set content='jjjjj' where id=?" 15])
(raw-execute! ["update ceshi_article set view_count = ( 2 * view_count ) where view_count < ?" 50])To do list
Document
Create table
Migration
Insert or update
Interacting with multiple databases
License
Copyright © 2019
Distributed under the Eclipse Public License, the same as Clojure.
