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querydsl | Unified Queries for Java | Object-Relational Mapping library

 by   querydsl Java Version: QUERYDSL_5_0_0 License: Apache-2.0

 by   querydsl Java Version: QUERYDSL_5_0_0 License: Apache-2.0

kandi X-RAY | querydsl Summary

querydsl is a Java library typically used in Utilities, Object-Relational Mapping, MongoDB, Hibernate, JPA applications. querydsl has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can download it from GitHub, Maven.
Querydsl is a framework which enables the construction of type-safe SQL-like queries for multiple backends including JPA, MongoDB and SQL in Java. Instead of writing queries as inline strings or externalizing them into XML files they are constructed via a fluent API. Use these tutorials to get started. Free support is provided in the Discussion Section and on StackOverflow. Please do not post questions as issue. Such issues will be closed immediately. Querydsl provides releases via public Maven repositories, but you can also build the sources yourself like this. Where projectname is one of the Maven profiles (e.g. jpa, sql, mongodb, etc. or all). For more information visit the project homepage at
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • querydsl has a highly active ecosystem.
  • It has 4122 star(s) with 805 fork(s). There are 161 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 71 open issues and 1859 have been closed. On average issues are closed in 585 days. There are 56 open pull requests and 0 closed requests.
  • It has a positive sentiment in the developer community.
  • The latest version of querydsl is QUERYDSL_5_0_0
querydsl Support
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping
querydsl Support
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping

quality kandi Quality

  • querydsl has 0 bugs and 0 code smells.
querydsl Quality
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping
querydsl Quality
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping

securitySecurity

  • querydsl has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • querydsl code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
querydsl Security
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping
querydsl Security
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping

license License

  • querydsl is licensed under the Apache-2.0 License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
querydsl License
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping
querydsl License
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping

buildReuse

  • querydsl releases are available to install and integrate.
  • Deployable package is available in Maven.
  • Build file is available. You can build the component from source.
  • Installation instructions are not available. Examples and code snippets are available.
  • querydsl saves you 116664 person hours of effort in developing the same functionality from scratch.
  • It has 134833 lines of code, 14975 functions and 2282 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
querydsl Reuse
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping
querydsl Reuse
Best in #Object-Relational Mapping
Average in #Object-Relational Mapping
Top functions reviewed by kandi - BETA

kandi has reviewed querydsl and discovered the below as its top functions. This is intended to give you an instant insight into querydsl implemented functionality, and help decide if they suit your requirements.

  • Entry point for import
    • Export the tables to the database
    • Handles a column
    • Handles a single table
  • Fetch rows
    • Generates the code for a factory constant
      • Visits a path
        • Executes the query and returns the result
          • Compile source string
            • Creates the source
          • Serialize entity properties
            • Outputs the column metadata
              • Iterates over the rows in the query and returns the result
                • Serialize the given metadata
                  • Returns the operands for spatial operations
                    • Execute the exporter
                      • Generates the body end of the model
                        • Write entity
                          • Intercept the method invocation
                            • Generate the introspection class for the entity class
                              • Creates class type
                                • Serialize a query metadata
                                  • Executes the delete
                                    • Handles an operation
                                      • Add to string
                                        • Serializes an entity type

                                          Get all kandi verified functions for this library.

                                          Get all kandi verified functions for this library.

                                          querydsl Key Features

                                          Querying JPA

                                          Querying SQL

                                          Querying Mongodb

                                          Querying Lucene

                                          Querying Collections

                                          Querydsl Spatial

                                          Querying JDO

                                          Oracle Express Edition 11g

                                          PostgreSQL 9.1.10

                                          MySQL 5.5.34

                                          Cubrid 9.2

                                          querydsl Examples and Code Snippets

                                          Community Discussions

                                          Trending Discussions on querydsl
                                          • how to do a count query when using rust diesel
                                          • How to filter stream in java with few parameters?
                                          • store spring JPA repository find data to variable before save?
                                          • web::block() fails with "`NonNull<pq_sys::pg_conn>` cannot be shared between threads safely"
                                          • FBDriver reporting warnings I can't figure out how to fix
                                          • PostgreSQL function used in QueryDSL is not working, returns ERROR: syntax error at or near "."
                                          • Upgrade to springboot 2.6.1 with querydsl jpa 5.0.0
                                          • QueryDsl reduce expression stream
                                          • what is the problem with my rust diesel pagination code
                                          • error: cannot find attribute `table_name` in this scope
                                          Trending Discussions on querydsl

                                          QUESTION

                                          how to do a count query when using rust diesel

                                          Asked 2022-Mar-27 at 08:21

                                          I am doing a count query using rust 1.59.0 diesel diesel = { version = "1.4.8", features = ["postgres","64-column-tables","chrono"] } following this document, this is my code looks like right now:

                                          use diesel::{ExpressionMethods, QueryDsl, QueryResult, RunQueryDsl};
                                          use diesel::dsl::count;
                                          use rocket::serde::json::Json;
                                          use rust_wheel::config::db::config;
                                          
                                          pub fn channel_fav_count(req_channel_id: &i64) -> i32 {
                                              use crate::model::diesel::dolphin::dolphin_schema::article_favorites::dsl::*;
                                              let connection = config::establish_connection();
                                              let query = article_favorites
                                                  .filter(channel_id.eq(req_channel_id));
                                              let query_result = query.select(count(id)).first(&connection);
                                              return query_result.unwrap_or(0);
                                          }
                                          

                                          when I compile the code, shows error like this:

                                          error[E0277]: the trait bound `i32: FromSql<BigInt, Pg>` is not satisfied
                                              --> src/service/app/cruise/article/article_fav_service.rs:11:48
                                               |
                                          11   |     let query_result = query.select(count(id)).first(&connection);
                                               |                                                ^^^^^ the trait `FromSql<BigInt, Pg>` is not implemented for `i32`
                                          

                                          why did this happen? what should I do to fix this problem?

                                          ANSWER

                                          Answered 2022-Mar-27 at 08:21

                                          first thing you must know it's query count return i64 not i32, so you must convert i64 to i32 by your self

                                          maybe like this

                                          let query_result = query.select(count(id)).first(&connection).map(|x| x as i32);
                                          

                                          also you can get count by filter query like below

                                          users
                                              .filter(user_id.eq(_user_id))
                                              .count()
                                              .get_result(conn) // Result<i64, Error>
                                          

                                          for your code it's like this

                                          article_favorites
                                              .filter(channel_id.eq(req_channel_id))
                                              .count()
                                              .get_result(&connection)
                                          

                                          Source https://stackoverflow.com/questions/71634411

                                          Community Discussions, Code Snippets contain sources that include Stack Exchange Network

                                          Vulnerabilities

                                          No vulnerabilities reported

                                          Install querydsl

                                          You can download it from GitHub, Maven.
                                          You can use querydsl like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the querydsl component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

                                          Support

                                          For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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                                          Clone
                                          • https://github.com/querydsl/querydsl.git

                                          • gh repo clone querydsl/querydsl

                                          • git@github.com:querydsl/querydsl.git

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