best java orm framework

Database operations suggest an ORM framework that is simple and efficient. Xutils is recommended here, which contains dbutils. GitHub Address: Https://github.com/wyouflf/xUtilsA singleton schema is recommended for obtaining a DB instance. 　 StaticDbutils db =NULL; Public Staticdbutils Getdb (context context) {if(Context = =NULL) {Context=doctorapplication.getinstance (); }if(db = =NULL) {db= Dbutils.create

Use the Python web. py framework to implement a query tutorial similar to Django's ORM, web. pydjango Query objects in Django The Django framework comes with an ORM that provides powerful and convenient query functions. These functions are irrelevant to tables. For example: class Question(models.Model): question_text

Label:Create a Record object with the Name property of the James,age property of 25 and add it to the database record user = new record (). Set ("Name", "James"). Set ("Age", +); Db.save ("user", user); Delete the record in the user table with ID value 25 ("User", Db.deletebyid); A record with a query ID value of 25 changes its Name property to James and updates it to the database user = Db.findbyid ("user"). Set ("Name", "James"); Db.update ("user", user); The query ID value is 25 for use

NotORM (php orm framework) sample code. In the download topic, we released NotORM, a completely free PHP library to simplify interaction with databases. The most distinctive feature is that it is very easy to process table associations. In the download topic, we released NotORM, a completely free PHP library to simplify interaction with databases. The most distinctive feature is that it is very easy to proc

the specified SQL FileLoaddata loads initial data (similar to sqlcustom, but there is no original SQL)Dmpdata outputs the data in the existing database as jason, in xml format. Query related methodsAll returns a QuerySet of all data records in the include mode.Filter returns a QuerySet containing model records that meet the specified conditions.The opposite of exclude and filter is used to find records that do not meet the conditions.Get gets a single qualified record. If no or more records are

SHA-1: abca3b99801648fa23c7f4934de6c128f042cf47* Submit new version: V1.31. Refactoring: Fs.mapping namespace moved to FS. In Core.map2. Refactoring: Change the set3, Reconstruction: Mapping scheme to: Physical mapping (cache) + data map (no cache, dynamic operation changes)4, Reconstruction: Merge field database mapping and data detection5. Remove: Contextmap, Fieldstate, SetState, SetAttribute, Sortdeleteattribute mappings6. Remove: Fs.extends extension and namespace7, added: Contextdatamap, C

ASP. net mvc uses the Petapoco micro ORM framework + NpgSql driver to connect to the PostgreSQL database (problem summary), petapocoorm The installation process is simple: 1. Before reading the code, we need to load NpgSql and Petapoco into the current project. I will use Nuget to add them to the current project, as shown below: Install-Package Npgsql Install-Package PetaPoco 2. Let's take a look at the i

Let's say that we want to record it with friends in the garden and ASP. net mvc uses the Petapoco micro-ORM framework + NpgSql driver to connect to the PostgreSQL database. This blog corresponds to a video. Since there is no time to record the video in a month, I have fulfilled my promise to my friends today .. The Directory of this video tutorial is video, code, and materials. There are 4 videos and the d

(String sql, object[] args) #endregion #region PublicPropertiesPublic Imapper defaultmapperpublic BOOL enableautoselect;public bool Enablenamedparams;public int commandtimeout; public int onetimecommandtimeout;public Iprovider providerpublic string connectionstringpublic isolationlevel? Isolationlevel#endregion#region Member FieldsMember variablesprivate imapper _defaultmapper;private string _connectionstring;private iprovider _provider;private IDbConnection _sharedconnection;private idbtransac

How can we make our framework pseudo-Orm? I thought for a moment in the morning and suddenly came to the inspiration. 1. Get a complete entity We usually obtain a primary object. We hope to obtain the set of other entities contained by the object by the way. For example, orderentity wants to access the orderitementity set by the way. Since datatable can only obtain its own, it is necessary to obtain the c

Mysqlconnection (connstr))//{ //var multi = conn. Querymultiple ("SELECT * FROM Student;select * from class;"); //var studentlist = multi. Read//var classlist = multi. Read//Console.WriteLine ($ "Student:{studentlist.count} bar! "); //Console.WriteLine ($ "Classlist:{classlist.count} bar! "); //} #endregion #endregion #region3. Modifications#region3.0 Modifications//using (mysqlconnection conn = new Mysqlconnection (co

(Student.class, Sno); /*Delete*/Session.delete (STU); Tx.commit (); Session.close (); } /*Enquiry*/ PublicListGetAll () {Session s=sf.opensession (); String hql= "From Student"; /*Enquiry*/Lists.createquery (HQL). List (); S.close (); returnlist; } }5) Test Testing Packagetest;ImportDAO. Studentdao;Importentity. Student; Public classMain { Public Static voidMain (string[] args) {Studentdao dao=NewStudentdao (); /*Add*/Student Stu=NewStudent (); Stu.setsno ("22

table of the department can be empty, until the fresh, formally become a department, it is not empty. Also indicates that the foreign key can be empty at ordinary time)**********5The query form of the associated data (retrieval policy) ****************************************************loading of associated data in 3 scenarios1Delay (lazy) is also called lazy loading: Session.close () is called immediately after the class data is found; the default is lazy (lazy) loading. That is, the statemen

called, the function functions to add data to the external dictionary, which is useful in complex data processing.static void QueryTest2 () {Dapper.DefaultTypeMap.MatchNamesWithUnderscores = true; IDbConnection dbconnection = null; using (DbConnection = DbConnection. OpenConnection ()) {dictionary> dic = new dictionary> (); DbConnection. Queryt (@ "Select 1 as table1,t1.*,1 as table2,t2.* from [role] T1 left joins [user] T2 on t1.role_id = T2 . role_id ", (role, user)

, Attrs) * classModel (Dict, metaclass=modelmetaclass): $ Panax Notoginseng def __init__(Self, * *kw): -Super (Model, self).__init__(**kw) the + def __getattr__(self, key): A Try: the returnSelf[key] + exceptKeyerror: - RaiseAttributeerror (R"' Model ' object has no attribute '%s '"%key) $ $ def __setattr__(self, Key, value): -Self[key] =value - the defSave (self): -Fields = []Wuyiparams = [] theargs = [] - forKvinchSelf.__mappi

, false to not print "' #声明映射文件 fromsqlalchemy.ext.declarativeimport declarative_base #引入了declarative_base类 base=declarative_base () #实例化了一个declarative_base实例 fromsqlalchemyimportcolumn,integer,string #引入类Column,integer, String Class Classuser (base): #创建自己的实例类 name user inherit Base class __tablename__ = ' users ' #这个属性, indicating that thisClass and the Users table in the database are mapped id=column (integer,primary_key=true) # This property indicates that the ID represents a column in t

Well, for the friends in the garden. Record the video corresponding to the "ASP. NET MVC using Petapoco Mini ORM Framework +npgsql Drive Connection PostgreSQL database" This blog, because there is no time to record in one months, today I cashed the promise to my friends.This video tutorial directory for video, code, data, wherein the video has 4 paragraphs, the information is my collection of relevant infor

Ipredicate.exists () subquery filter condition statement + sort field, sample statement: SELECT * Form table where EXISTS (select 1 from table where [E Mail protected]). * Sub-query query based on multi-combination conditions (via ipredicate.exists () subquery filter condition statement + sort field, sample statement: SELECT * FROM Table Where EXISTS (select Count (1) from table Where ([email protected] and [email protected]) OR ([email protected] and [email protected])). *searchordersbypag

example, I Need To Cache all enabled gameinformation.First, let the gameinformation object class inherit from icachedentity: public partial class gameinformation: icachedentity {//} The primary key ID of the gameinformation table is a string type.Next, inherit from datarabbit. application. cache. entitycache to obtain the specific cache class gameinfocache: public class gameinfocache: entitycache {Protected override ifiltertree createfiltertree (){// Retrieve all enabled Game InformationReturn

Android ORM framework ActiveAndroid and ormactiveandroid1. In AndroidManifest. xml, we need to add these twoAA_DB_NAME (Database name, which cannot be changed, but is optional. If this parameter is left blank, the default value is "Application. db) AA_DB_VERSION (the database version number is also optional-the default value is 1) ... 2. initialize In the first Activity or application 3. To create an ob