GQL015: Can't infer a Field name from expression

Cause

This rule triggers when field defined with expression which is not a simple member access expression.

Rule description

When defining fields with expression, the GraphQL.NET tries to infer the field name from the expression. This is only possible when the expression is a simple member access expression like field or property. For example

p => p.FirstName

How to fix violations

Use an overload that accepts a name parameter to define the field name explicitly.

Example of a violation

public class PersonGraphType : ObjectGraphType<Person> { public PersonGraphType() { Field(p => $"{p.FirstName} {p.LastName}"); } } public class Person { public string FirstName { get; set; } public string LastName { get; set; } }

Example of how to fix

Define the field name explicitly

public class PersonGraphType : ObjectGraphType<Person> { public PersonGraphType() { Field("FullName", p => $"{p.FirstName} {p.LastName}"); } } public class Person { public string FirstName { get; set; } public string LastName { get; set; } }

Suppress a warning

If you just want to suppress a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable GQL015 // The code that's violating the rule is on this line. #pragma warning restore GQL015

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.cs] dotnet_diagnostic.GQL015.severity = none

For more information, see How to suppress code analysis warnings.

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