How to execute Anonymous Block PL/pgSQL (PostgreSQL 13) from Npgsql 4.1.5.0 in C#
来源： https://stackoverflow.com/questions/64409013/how-to-execute-anonymous-block-pl-pgsql-postgresql-13-from-npgsql-4-1-5-0-in-c
npgsql
Inserting data into PostgreSQL jsonb column with Daper.Net and NPGSQL
来源： https://stackoverflow.com/questions/51129950/inserting-data-into-postgresql-jsonb-column-with-daper-net-and-npgsql
C# SSH tunnel Postgres database connection
来源： https://stackoverflow.com/questions/58207371/c-sharp-ssh-tunnel-postgres-database-connection
C# SSH tunnel Postgres database connection
来源： https://stackoverflow.com/questions/58207371/c-sharp-ssh-tunnel-postgres-database-connection
Npgsql Enum Error
来源： https://stackoverflow.com/questions/36065960/npgsql-enum-error
Npgsql Enum Error
来源： https://stackoverflow.com/questions/36065960/npgsql-enum-error
在ef core中使用postgres数据库的全文检索功能实战
起源 之前做的很多项目都使用solr/elasticsearch作为全文检索引擎，它们功能全面而强大，但是对于较小的项目而言，构建和维护成本显然过高，尤其是从关系数据库/文档数据库到全文检索引擎的数据同步工作非常繁琐，且容易出错。 记得很久以前就知道postgresql数据库内置全文检索，最近发现这个数据库越来越火，于是就又研究了一番，欣喜的发现居然支持ef core，于是对其进行了一些研究，并整理心得如下。 前提 本文假设读者熟悉entity framework core的基本概念和基本使用。 目的 建立dotnet core项目，使用postgres数据库和ef core，实现常见的全文检索功能，包括 建立索引字段 基本查询 查询结果排名 查询结果高亮显示 步骤1 - 新建项目并引入packages < Project Sdk ="Microsoft.NET.Sdk" > < PropertyGroup > < OutputType > Exe </ OutputType > < TargetFramework > netcoreapp3.1 </ TargetFramework > </ PropertyGroup > < ItemGroup > < PackageReference Include ="EFCore.NamingConventions" Version =
Message “28000: no pg_hba.conf entry for host \”xx.xxx.xxx.xxxx\“, user \”User“, database \”databasename\“, SSL off”
问题 I 'm trying to connect postgresql database remotely ( Heroku ). I use ASP Web api but always i have the same exception :Message "28000: no pg_hba.conf entry for host \"xx.xxx.xxx.xxxx\", user \"User", database \"databasename\", SSL off" I search some solution by editing the pg_hba.conf file and i add : host databasename username xx.xxx.xxx.xxxx md5 and no change . 回答1: Add sslmode=Require; and Trust Server Certificate=true; in your connection string.It will work for sure. 回答2: Heroku Postgres
PostgresException: 23505: duplicate key value violates unique constraint “PK_country”
问题 I am using EF Core 2.0 and Postgres 9.6. Whenever I insert data I get the error PostgresException: 23505: duplicate key value violates unique constraint "PK_country" By tracing it looks like EF doesnt generate AutoIncrement column My Model public partial class Country { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int CountryId { get; set; } [Display(Name="Country Name")] public string CountryName { get; set; } } My Controller if (ModelState.IsValid) { _context.Add
PostgresException: 23505: duplicate key value violates unique constraint “PK_country”
问题 I am using EF Core 2.0 and Postgres 9.6. Whenever I insert data I get the error PostgresException: 23505: duplicate key value violates unique constraint "PK_country" By tracing it looks like EF doesnt generate AutoIncrement column My Model public partial class Country { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int CountryId { get; set; } [Display(Name="Country Name")] public string CountryName { get; set; } } My Controller if (ModelState.IsValid) { _context.Add