Add migration for EnvironmentRole

atst/models/environment_role.py

@@ -0,0 +1,32 @@
+from enum import Enum
+from sqlalchemy import Index, ForeignKey, Column, String
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import relationship
+
+from atst.models import Base
+from .types import Id
+
+
+class CSPRole(Enum):
+    NONSENSE_ROLE = "nonesense_role"
+
+
+class EnvironmentRole(Base):
+    __tablename__ = "environment_roles"
+
+    id = Id()
+    environment_id = Column(UUID(as_uuid=True), ForeignKey("environments.id"))
+    environment = relationship("Environment", backref="roles")
+
+    role = Column(String())
+
+    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id"))
+    user = relationship("User", backref="environment_roles")
+
+
+Index(
+    "environments_role_user_environment",
+    EnvironmentRole.user_id,
+    EnvironmentRole.environment_id,
+    unique=True,
+)