Catch invalid migration name when generating a new migration

sea-orm-cli/src/commands/migrate.rs

@@ -2,6 +2,7 @@ use chrono::{Local, Utc};
 use regex::Regex;
 use std::{
     error::Error,
+    fmt::Display,
     fs,
     io::Write,
     path::{Path, PathBuf},
@@ -115,6 +116,14 @@ pub fn run_migrate_generate(
     migration_name: &str,
     universal_time: bool,
 ) -> Result<(), Box<dyn Error>> {
+    // Make sure the migration name doesn't contain any characters that
+    // are invalid module names in Rust.
+    if migration_name.contains('-') {
+        return Err(Box::new(MigrationCommandError::InvalidName(
+            "Hyphen `-` cannot be used in migration name".to_string(),
+        )));
+    }
+
     println!("Generating new migration...");
 
     // build new migration filename
@@ -225,6 +234,23 @@ fn update_migrator(migration_name: &str, migration_dir: &str) -> Result<(), Box<
     Ok(())
 }
 
+#[derive(Debug)]
+enum MigrationCommandError {
+    InvalidName(String),
+}
+
+impl Display for MigrationCommandError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            MigrationCommandError::InvalidName(name) => {
+                write!(f, "Invalid migration name: {}", name)
+            }
+        }
+    }
+}
+
+impl Error for MigrationCommandError {}
+
 #[cfg(test)]
 mod tests {
     use super::*;