findAll
目的 Purpose
Finds all of domain class instances matching the specified query使用例 Examples
// everything Book.findAll()// with a positional parameter Book.findAll("from Book as b where b.author=?", ['Dan Brown'])// 10 books from Dan Brown staring from 5th book ordered by release date Book.findAll("from Book as b where b.author=? order by b.releaseDate", ['Dan Brown'], [max: 10, offset: 5])// examples with max/offset usage def query = "from Book as b where b.author='Dan Brown' order by b.releaseDate"// first 10 books Book.findAll(query, [max: 10])// 10 books starting from 5th Book.findAll(query, [max: 10, offset: 5])// examples with named parameters Book.findAll("from Book as b where b.author=:author", [author: 'Dan Brown']) Book.findAll("from Book as b where b.author=:author", [author: 'Dan Brown'], [max: 10, offset: 5]) Book.findAll("from Book as b where b.author in (:authors)", [authors: ['Dan Brown', 'Jack London']])// examples with tables join Book.findAll("from Book as b where not exists " + "(from Borrow as br where br.book = b)")// query by example def example = new Book(author: "Dan Brown") Book.findAll(example)// Use where criteria (since Grails 2.0) def results = Person.findAll { lastName == "Simpson" } def results = Person.findAll(sort:"firstName") { lastName == "Simpson" }
詳細 Description
The findAll method allows querying with Hibernate's query language HQL and querying by example, returning all matching instances. Pagination can be controlled using the max and offset parameters:Book.findAll("from Book as b where b.author=:author",
[author: 'Dan Brown'], [max: 10, offset: 5])findAll method supports the 2nd level cache:Book.findAll("from Book as b where b.author=:author", [author:'Dan Brown'], [max: 10, offset: 5, cache: true])
Book.findAll() Book.findAll(String query) Book.findAll(String query, Collection positionalParams) Book.findAll(String query, Collection positionalParams, Map queryParams) Book.findAll(String query, Map namedParams) Book.findAll(String query, Map namedParams, Map queryParams) Book.findAll(Book example) Book.findAll(Closure whereCriteria) Book.findAll(Map queryParams, Closure whereCriteria)
If you have a join in your HQL, the method will return aパラメータ:ListofArrays containing domain class instances. You may wish to use executeQuery in this case so you have more flexibility in specifying what gets returned.
Parameters:
query- An HQL querypositionalParams- AListof parameters for a positional parametrized HQL querynamedParams- AMapof named parameters a HQL queryqueryParams- AMapcontaining parameters 'max', and/or 'offset' and/or 'cache'example- An instance of the domain class for query by examplereadOnly-trueif returned objects should not be automatically dirty-checked (simlar toread())fetchSize- number of rows fetched by the underlying JDBC driver per round tripflushMode- HibernateFlushModeoverride, defaults toFlushMode.AUTOtimeout- query timeout in seconds