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Версия 1.4 от Alexandr Fokin на 2024/02/24 15:13
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1.3 | 1 | |(% style="width:141px" %) |(% style="width:1372px" %) |
| 2 | |(% style="width:141px" %)[[JSON>>doc:Разработка.Схемы данных, контракты, форматы.Text.JSON.WebHome]] тип данных|(% style="width:1372px" %)((( | ||
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1.1 | 3 | | |Can JSONB GIN indexes be specified in CodeFirst EntityFramework with NPGSQL? |
| 4 | [[https:~~/~~/stackoverflow.com/questions/54618858/can-jsonb-gin-indexes-be-specified-in-codefirst-entityframework-with-npgsql>>https://stackoverflow.com/questions/54618858/can-jsonb-gin-indexes-be-specified-in-codefirst-entityframework-with-npgsql]] | ||
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1.4 | 5 | |Тип сущности|((( |
| 6 | JSON Mapping | ||
| 7 | [[https:~~/~~/www.npgsql.org/efcore/mapping/json.html?tabs=data-annotations%2Cpoco>>https://www.npgsql.org/efcore/mapping/json.html?tabs=data-annotations%2Cpoco]] | ||
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| 9 | [[System. Text. Json>>doc:Разработка.NET.Библиотеки.Документы.Форматы данных и схемы.NET Json.System\. Text\. Json.WebHome]] | ||
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1.3 | 10 | Позволяет использовать JsonDocument и JsonElement. |
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1.4 | 11 | ))) |
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1.3 | 12 | | | |
| 13 | ))) | ||
| 14 | |(% style="width:141px" %)Parameters|(% style="width:1372px" %){{code language="c#"}}public static class QueryParameterExtensions | ||
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1.2 | 15 | { |
| 16 | public static NpgsqlParameter StructToDbParameter<T>( | ||
| 17 | this T value, | ||
| 18 | string name, | ||
| 19 | NpgsqlDbType type | ||
| 20 | ) | ||
| 21 | where T : struct | ||
| 22 | { | ||
| 23 | return new NpgsqlParameter<T>(name, type) { TypedValue = value }; | ||
| 24 | } | ||
| 25 | |||
| 26 | public static NpgsqlParameter StructToDbParameter<T>( | ||
| 27 | this T? value, | ||
| 28 | string name, | ||
| 29 | NpgsqlDbType type | ||
| 30 | ) | ||
| 31 | where T : struct | ||
| 32 | { | ||
| 33 | if (!value.HasValue) | ||
| 34 | { | ||
| 35 | return new NpgsqlParameter(name, type) { Value = DBNull.Value }; | ||
| 36 | } | ||
| 37 | |||
| 38 | return new NpgsqlParameter<T>(name, type) { TypedValue = value.Value }; | ||
| 39 | } | ||
| 40 | |||
| 41 | public static NpgsqlParameter ClassToDbParameter<T>( | ||
| 42 | this T value, | ||
| 43 | string name, | ||
| 44 | NpgsqlDbType type | ||
| 45 | ) | ||
| 46 | where T : class | ||
| 47 | { | ||
| 48 | if (value == null) | ||
| 49 | { | ||
| 50 | return new NpgsqlParameter(name, type) { Value = DBNull.Value }; | ||
| 51 | } | ||
| 52 | |||
| 53 | return new NpgsqlParameter<T>(name, type) { TypedValue = value }; | ||
| 54 | } | ||
| 55 | }{{/code}} | ||
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1.3 | 56 | |(% style="width:141px" %) |(% style="width:1372px" %) |
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1.1 | 57 | |
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