How to configure fluently from appsettings.json

[mwpowellhtx]

Is it even possible? If a blog even mentions how, the only thing I see are Xml config files. If not... re: Json, then how exactly do we configure via config? I should also mention we are configuring postgres drivers using the Npgsql project.

[oskarb]

FluentNHibernate is an add-on to configure NHibernate using code instead of configuration files. So I'm confused... Are you using just NHibernate with XML configuration or what do you mean?

[mwpowellhtx]

No, I know how to load the mappings and so forth during fluent configuration.

I am asking about configuration details, is there a fluent mechanism to load those wholesale via configuration file? As either Xml config? or appsettings.json?

I was not finding one (such a mechanism), opposite any of the obvious fluent roots, etc. But my eye sight ain't what it used to be, perhaps I missed it somewhere in the properties and methods.

So for instance...

SessionFactory = Fluently.Configure()
    .Database(PostgreSQLConfiguration.Standard.FromSettingsJson("appsettings.json"))
    // My own extension...                     ^^^^^^^^^^^^^^^^
    .ExposeConfiguration(OnExposeConfiguration)
    .Mappings(OnMappingConfiguration)
    .BuildSessionFactory()
    ;

And the extension, for brevity:

public static PostgreSQLConfiguration FromSettingsJson(this PostgreSQLConfiguration config, string path, string root = "nhibernate")
{
    const StringComparison IgnoreCase = StringComparison.InvariantCultureIgnoreCase;

    using var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
    using var sr = new StreamReader(fs);

    var json = sr.ReadToEnd();

    // Using Newtonsoft.Json.Linq
    var jRoot = JObject.Parse(json);

    if (jRoot.Property(root, IgnoreCase)?.Value is JObject jConfig)
    {
        // if jConfig whatever config.Respond(...)
        // Yada, yada, yada, and so on...
    }

    return config;
}

[fredericDelaporte]

There is no support of reading configuration from appsettings.json currently. NHibernate still relies by default on its own xml configuration file. But everything can be configured programmatically, so, putting configuration into the appsettings.json is possible. It is then up to the application developer to read it and perform the programmatic configuration of NHibernate from it.

[mwpowellhtx]

Exactly what I've done. Thanks! 👍