public virtual SqlExpression Translate( SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger) { if (method.DeclaringType != typeof(MySqlJsonDbFunctionsExtensions)) { return(null); } var args = arguments // Skip useless DbFunctions instance .Skip(1) // JSON extensions accept object parameters for JSON, since they must be able to handle POCOs, strings or DOM types. // This means they come wrapped in a convert node, which we need to remove. // Convert nodes may also come from wrapping JsonTraversalExpressions generated through POCO traversal. .Select(RemoveConvert) // CHECK: Either just not doing this at all is fine, or not applying it to JsonQuote and JsonUnquote // (as already implemented below) is needed. An alternative would be to move the check into the local // json() function. // // If a function is invoked over a JSON traversal expression, that expression may come with // returnText: true (i.e. operator ->> and not ->). Since the functions below require a json object and // not text, we transform it. // .Select( // a => a is MySqlJsonTraversalExpression traversal && // method.Name != nameof(MySqlJsonDbFunctionsExtensions.JsonQuote) && // method.Name != nameof(MySqlJsonDbFunctionsExtensions.JsonUnquote) // ? withReturnsText(traversal, false) // : a) .ToArray(); var result = method.Name switch { nameof(MySqlJsonDbFunctionsExtensions.AsJson) => _sqlExpressionFactory.ApplyTypeMapping( args[0], _sqlExpressionFactory.FindMapping(method.ReturnType, "json")), nameof(MySqlJsonDbFunctionsExtensions.JsonType) => _sqlExpressionFactory.NullableFunction( "JSON_TYPE", new[] { Json(args[0]) }, typeof(string)), nameof(MySqlJsonDbFunctionsExtensions.JsonQuote) => _sqlExpressionFactory.NullableFunction( "JSON_QUOTE", new[] { args[0] }, method.ReturnType), nameof(MySqlJsonDbFunctionsExtensions.JsonUnquote) => _sqlExpressionFactory.NullableFunction( "JSON_UNQUOTE", new[] { args[0] }, method.ReturnType), nameof(MySqlJsonDbFunctionsExtensions.JsonExtract) => _sqlExpressionFactory.NullableFunction( "JSON_EXTRACT", Array.Empty <SqlExpression>() .Append(Json(args[0])) .Concat(DeconstructParamsArray(args[1])), method.ReturnType, _sqlExpressionFactory.FindMapping(method.ReturnType, "json"), false), nameof(MySqlJsonDbFunctionsExtensions.JsonContains) => _sqlExpressionFactory.NullableFunction( "JSON_CONTAINS", args.Length >= 3 ? new[] { Json(args[0]), args[1], args[2] } : new[] { Json(args[0]), args[1] }, typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonContainsPath) => _sqlExpressionFactory.NullableFunction( "JSON_CONTAINS_PATH", new[] { Json(args[0]), _sqlExpressionFactory.Constant("one"), args[1] }, typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonContainsPathAny) => _sqlExpressionFactory.NullableFunction( "JSON_CONTAINS_PATH", Array.Empty <SqlExpression>() .Append(Json(args[0])) .Append(_sqlExpressionFactory.Constant("one")) .Concat(DeconstructParamsArray(args[1])), typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonContainsPathAll) => _sqlExpressionFactory.NullableFunction( "JSON_CONTAINS_PATH", Array.Empty <SqlExpression>() .Append(Json(args[0])) .Append(_sqlExpressionFactory.Constant("all")) .Concat(DeconstructParamsArray(args[1])), typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonSearchAny) => _sqlExpressionFactory.IsNotNull( _sqlExpressionFactory.NullableFunction( "JSON_SEARCH", Array.Empty <SqlExpression>() .Append(Json(args[0])) .Append(_sqlExpressionFactory.Constant("one")) .Append(args[1]) .AppendIfTrue( args.Length >= 3, () => args.Length >= 4 ? args[3] : _sqlExpressionFactory.Constant(null, RelationalTypeMapping.NullMapping)) .AppendIfTrue(args.Length >= 3, () => args[2]), typeof(bool), null, false)), // JSON_SEARCH can return null even if all arguments are not null _ => null }; return(result); SqlExpression Json(SqlExpression e) => _sqlExpressionFactory.ApplyTypeMapping(EnsureJson(e), _sqlExpressionFactory.FindMapping(e.Type, "json"));
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (method.DeclaringType != typeof(MySqlJsonDbFunctionsExtensions)) { return(null); } var args = arguments // Skip useless DbFunctions instance .Skip(1) // JSON extensions accept object parameters for JSON, since they must be able to handle POCOs, strings or DOM types. // This means they come wrapped in a convert node, which we need to remove. // Convert nodes may also come from wrapping JsonTraversalExpressions generated through POCO traversal. .Select(removeConvert) // If a function is invoked over a JSON traversal expression, that expression may come with // returnText: true (i.e. operator ->> and not ->). Since the functions below require a json object and // not text, we transform it. .Select(a => a is MySqlJsonTraversalExpression traversal ? withReturnsText(traversal, false) : a) .ToArray(); if (!args.Any(a => a.TypeMapping is MySqlJsonTypeMapping || a is MySqlJsonTraversalExpression)) { throw new InvalidOperationException("The EF JSON methods require a JSON parameter but none was found."); } var result = method.Name switch { nameof(MySqlJsonDbFunctionsExtensions.JsonType) => _sqlExpressionFactory.Function( "JSON_TYPE", new[] { args[0] }, typeof(string)), nameof(MySqlJsonDbFunctionsExtensions.JsonContains) => _sqlExpressionFactory.Function( "JSON_CONTAINS", args.Length >= 3 ? new[] { json(args[0]), args[1], args[2] } : new[] { json(args[0]), args[1] }, typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonContainsPath) => _sqlExpressionFactory.Function( "JSON_CONTAINS_PATH", new[] { json(args[0]), _sqlExpressionFactory.Constant("one"), args[1] }, typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonContainsPathAny) => _sqlExpressionFactory.Function( "JSON_CONTAINS_PATH", Array.Empty <SqlExpression>() .Append(json(args[0])) .Append(_sqlExpressionFactory.Constant("one")) .Concat(deconstructParamsArray(args[1])), typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonContainsPathAll) => _sqlExpressionFactory.Function( "JSON_CONTAINS_PATH", Array.Empty <SqlExpression>() .Append(json(args[0])) .Append(_sqlExpressionFactory.Constant("all")) .Concat(deconstructParamsArray(args[1])), typeof(bool)), nameof(MySqlJsonDbFunctionsExtensions.JsonSearchAny) => _sqlExpressionFactory.IsNotNull( _sqlExpressionFactory.Function( "JSON_SEARCH", Array.Empty <SqlExpression>() .Append(json(args[0])) .Append(_sqlExpressionFactory.Constant("one")) .Append(args[1]) .AppendIfTrue(args.Length >= 3, () => args.Length >= 4 ? args[3] : _sqlExpressionFactory.Constant(null, RelationalTypeMapping.NullMapping)) .AppendIfTrue(args.Length >= 3, () => args[2]), typeof(bool))), nameof(MySqlJsonDbFunctionsExtensions.JsonSearchAll) => _sqlExpressionFactory.IsNotNull( _sqlExpressionFactory.Function( "JSON_SEARCH", Array.Empty <SqlExpression>() .Append(json(args[0])) .Append(_sqlExpressionFactory.Constant("all")) .Append(args[1]) .AppendIfTrue(args.Length >= 3, () => args.Length >= 4 ? args[3] : _sqlExpressionFactory.Constant(null, RelationalTypeMapping.NullMapping)) .AppendIfTrue(args.Length >= 3, () => args[2]), typeof(bool))) as SqlExpression, _ => null }; return(result); SqlExpression json(SqlExpression e) => _sqlExpressionFactory.ApplyTypeMapping(e, _sqlExpressionFactory.FindMapping(e.Type, "json"));