


Using MySql with Entity Framework 4 and the Code-First Development CTP
Scott Guthrie's recent post on code-first development with Entity Framework 4 sparked interest in experimenting with it using MySql instead of Sql Server. However, configure Entity Framework 4 to generate the database automatically with MySql.
Exception:
The initial attempt resulted in a ProviderIncompatibleException, indicating that the NerdDinners database did not exist. Creating the database manually also did not resolve the issue, leading to a second ProviderIncompatibleException stating that "DatabaseExists is not supported by the provider".
Resolution:
After further exploration, a few key points emerged:
- Database Creation: MySql requires the existence of the database before using Entity Framework 4. The initial expectation of automatic database creation did not align with MySql's behavior.
- DbContext Connection: Each DbContext instance requires a corresponding connection string in the web.config file. In the provided code snippet, the "NerdDinners" context must have a connection string named "NerdDinners".
- Table Naming: Entity Framework 4 uses the DBSet property name to determine the table name. Careful consideration should be taken when naming these properties to obtain the desired table names.
- Web.Config Modification: When deploying the MVC application with MySQL, a DataFactory needs to be included in the web.config file to address potential compatibility issues with MySql connectors. The following code should be added to the web.config:
<code class="xml"><system.data> <dbproviderfactories> <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.3.6.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></add> </dbproviderfactories> </system.data></code>
- Dll Inclusion: Copying the MySQL DLLs into the deployment and setting their CopyLocal attribute to True ensures compatibility.
The above is the detailed content of How to Use MySql with Entity Framework 4 and Code-First Development: A Step-by-Step Guide?. For more information, please follow other related articles on the PHP Chinese website!

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

Article discusses strategies for handling large datasets in MySQL, including partitioning, sharding, indexing, and query optimization.

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]

The article discusses dropping tables in MySQL using the DROP TABLE statement, emphasizing precautions and risks. It highlights that the action is irreversible without backups, detailing recovery methods and potential production environment hazards.

Article discusses using foreign keys to represent relationships in databases, focusing on best practices, data integrity, and common pitfalls to avoid.

The article discusses creating indexes on JSON columns in various databases like PostgreSQL, MySQL, and MongoDB to enhance query performance. It explains the syntax and benefits of indexing specific JSON paths, and lists supported database systems.

Article discusses securing MySQL against SQL injection and brute-force attacks using prepared statements, input validation, and strong password policies.(159 characters)


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version
Visual web development tools

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
