11/19/2023 0 Comments Boolean mysql data typeAn old blog post from Baron Schwartz that documents this history and behaviour states, NET Connector to use TINYINT(1) as the default column data type instead of BIT(1) stems from the history of the BIT data type in MySQL. I suspect that, due to the nature of the error as detailed above, there's an incredible amount of different C# code that, when translated to the MySQL SQL dialect, generates SQL of sufficient amount and complexity that the exception is thrown.įinally, it would appear that the choice of the MySQL. It should be noted that the same " String was not recognized as a valid Boolean" exception can be thrown when using other Entity Framework functionality, however, I've yet to pin down exactly what code can cause the error. Performing this configuration in the OnModelCreating method of the DbContext object ensures that this configuration applies to all entities, both those already existing and any new ones created in the future, ensuring they are modelled with a BIT(1) column data type rather than a TINYINT(1) data type. ModelBuilder.Properties().Configure(c => c.HasColumnType("bit")) This must be done explicitly in code using code such as the following: protected override void OnModelCreating(DbModelBuilder modelBuilder) In order to fix the issue, we simply have to ensure that the MySQL connector, via Entity Framework, will model all Boolean entity properties as a BIT(1) data type column. In my (albeit limited) testing, it appeared that include'ing 5 or less related tables did not display the error, but Including more than 5 tables would cause the error consistently. NET Connector's attempt to generate the necessary SQL statement required for the query and subsequent parsing of that SQL statement would fail to parse any included TINYINT(1) columns as boolean values. It appears that the spurious exception is caused by the MySQL. However, take out a few of those "includes" and the query works perfectly with no exception thrown. Would result in the aforementioned exception being throw. Include(m => m.IncomeTypeGroups.Select(itg => itg.IncomeTypeGroup)), For example, code such as this: var results = dbContext.SocietyMemberships This occurs when performing such innocuous functionality as using a number of Entity Framework ( (v=vs.110).aspx) methods when attempting to retrieve a large enough graph of objects from the database. NET Connector to occasionally throw an exception which upon examination contains the error string, " String was not recognized as a valid Boolean". In using a TINYINT(1) data type by default, this causes the MySQL. This, in itself, isn't the bug, however the strange usage of a TINYINT(1) data type for a boolean column rather than the seemingly more appropriate BIT(1) datatype does enable the bug to subsequently raise it's head. Get modelled with a TINYINT(1) data type rather than the more appropriate BIT datatype. NET Connector contains a bug whereby database columns that are generated for any boolean property of an entity, by default, NET Connector) handle and model boolean entity properties, modelling them as a TINYINT(1) column by default, and causing odd and spurious errors, such as the " String was not recognized as a valid Boolean" error when performing entirely innocuous Entity Framework functions within your code. It appears that there are some "interesting" issues regarding how MySQL (and the. In my current role, I'm using MySQL v5.6 as the database engine for an ASP.NET MVC web application which also uses Entity Framework v6.1.3 as the ORM to connect to the backend database, doing so via the use of the MySQL.
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