52 lines
1.9 KiB
C#
52 lines
1.9 KiB
C#
using System.Text;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
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namespace Tiku.Infrastructure.Persistence;
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internal static class ModelBuilderExtensions
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{
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public static void UseSnakeCaseIdentifiers(this ModelBuilder modelBuilder)
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{
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foreach (var entityType in modelBuilder.Model.GetEntityTypes())
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{
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foreach (var property in entityType.GetProperties()) property.SetColumnName(ToSnakeCase(property.Name));
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foreach (var key in entityType.GetKeys())
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if (key.GetName() is { } keyName)
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key.SetName(ToSnakeCase(keyName));
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foreach (var foreignKey in entityType.GetForeignKeys())
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if (foreignKey.GetConstraintName() is { } constraintName)
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foreignKey.SetConstraintName(ToSnakeCase(constraintName));
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foreach (var index in entityType.GetIndexes())
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if (index.GetDatabaseName() is { } indexName)
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index.SetDatabaseName(ToSnakeCase(indexName));
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}
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}
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public static string ToSnakeCase(string value)
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{
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if (string.IsNullOrWhiteSpace(value)) return value;
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var builder = new StringBuilder(value.Length + 8);
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for (var index = 0; index < value.Length; index++)
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{
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var character = value[index];
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if (char.IsUpper(character) && index > 0 &&
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(char.IsLower(value[index - 1]) ||
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(index + 1 < value.Length && char.IsLower(value[index + 1]))))
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builder.Append('_');
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builder.Append(char.ToLowerInvariant(character));
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}
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return builder.ToString();
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}
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}
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internal sealed class SnakeCaseEnumConverter<TEnum>() : ValueConverter<TEnum, string>(
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value => ModelBuilderExtensions.ToSnakeCase(value.ToString()),
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value => Enum.Parse<TEnum>(value.Replace("_", string.Empty), true))
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where TEnum : struct, Enum; |