def type_to_ql_typeref(t: s_obj.Object) -> qlast.TypeName:
if not isinstance(t, s_types.Collection):
result = qlast.TypeName(
maintype=qlast.ObjectRef(module=t.name.module, name=t.name.name))
else:
result = qlast.TypeName(
maintype=qlast.ObjectRef(name=t.schema_name),
subtypes=[type_to_ql_typeref(st) for st in t.get_subtypes()])
return result
def typeref_to_ast(t: so.Object) -> ql_ast.TypeName:
if not isinstance(t, s_types.Collection):
if isinstance(t, so.ObjectRef):
name = t.classname
else:
name = t.name
result = ql_ast.TypeName(
maintype=ql_ast.ObjectRef(module=name.module, name=name.name))
else:
result = ql_ast.TypeName(
maintype=ql_ast.ObjectRef(name=t.schema_name),
subtypes=[typeref_to_ast(st) for st in t.get_subtypes()])
return result
def visit_TypeCast(self, node):
if node.type.subtypes:
typ = qlast.TypeName(
maintype=qlast.ObjectRef(name=node.type.maintype),
subtypes=[
qlast.ObjectRef(module=stn.module, name=stn.name)
for stn in node.type.subtypes
])
else:
mtn = node.type.maintype
mt = qlast.ObjectRef(module=mtn.module, name=mtn.name)
typ = qlast.TypeName(maintype=mt)
result = qlast.TypeCast(expr=self.visit(node.expr), type=typ)
return result
def _apply_field_ast(self, context, node, op):
if op.property == 'type':
tp = op.new_value
if isinstance(tp, s_types.Collection):
maintype = tp.schema_name
stt = tp.get_subtypes()
for st in stt:
eltype = qlast.ObjectRef(module=st.module, name=st.name)
tnn = qlast.TypeName(maintype=maintype, subtypes=[eltype])
else:
tnn = qlast.TypeName(maintype=tp)
node.type = tnn
else:
super()._apply_field_ast(context, node, op)
def reduce_ARRAY_LANGBRACKET_NonArrayTypeName_OptDimensions_RANGBRACKET(
self, *kids):
subtype = kids[2].val
dimensions = kids[3].val
self.val = qlast.TypeName(
maintype=qlast.ObjectRef(name='array'),
subtypes=[subtype],
dimensions=dimensions,
)
def reduce_NodeName(self, *kids):
maintype = kids[0].val
# maintype cannot be 'map' or 'array'
if maintype.module is None:
if maintype.name in ('array', 'map'):
raise EdgeQLSyntaxError(f"Unexpected {maintype.name!r}",
context=kids[0].context)
self.val = qlast.TypeName(maintype=maintype)
def reduce_ATTRIBUTE_ParenRawString_DeclarationSpecsBlob(self, *kids):
eql = kids[1].parse_as_attribute_decl()
attributes = []
for spec in kids[2].val:
if isinstance(spec, esast.Attribute):
attributes.append(spec)
else:
raise SchemaSyntaxError('illegal definition',
context=spec.context)
self.val = esast.AttributeDeclaration(
name=eql.name.name,
extends=[qlast.TypeName(maintype=base) for base in eql.bases],
type=eql.type,
attributes=attributes)
def reduce_Expr_LBRACKET_IS_NodeName_RBRACKET(self, *kids):
# The path filter rule is here to resolve ambiguity with
# indexes and slices, so Expr needs to be enforced as a path.
#
# NOTE: We specifically disallow "Foo.(bar[IS Baz])"" because
# it is incorrect logical grouping. The example where the
# incorrect grouping is more obvious is: "Foo.<(bar[IS Baz])"
path = kids[0].val
if (isinstance(path, qlast.Path)
and isinstance(path.steps[-1], qlast.Ptr)):
# filtering a longer path
path.steps[-1].target = kids[3].val
self.val = path
else:
# any other expression is a path with a filter
self.val = qlast.TypeFilter(
expr=path, type=qlast.TypeName(maintype=kids[3].val))
def _classbases_from_ast(cls, astnode, context, schema):
classname = cls._classname_from_ast(astnode, context, schema)
modaliases = context.modaliases
bases = so.ObjectList(
utils.ast_to_typeref(
qlast.TypeName(maintype=b),
modaliases=modaliases, schema=schema)
for b in getattr(astnode, 'bases', None) or []
)
mcls = cls.get_schema_metaclass()
if not bases and classname not in mcls.get_root_classes():
default_base = mcls.get_default_base_name()
if default_base is not None and classname != default_base:
bases = so.ObjectList([
so.ObjectRef(classname=default_base)
])
return bases
def _cmd_tree_from_ast(cls, astnode, context, schema):
cmd = super()._cmd_tree_from_ast(astnode, context, schema)
if isinstance(astnode, cls.referenced_astnode):
objcls = cls.get_schema_metaclass()
try:
base = utils.ast_to_typeref(
qlast.TypeName(maintype=astnode.name),
modaliases=context.modaliases,
schema=schema)
except s_err.ItemNotFoundError:
# Certain concrete items, like pointers create
# abstract parents implicitly.
nname = objcls.get_shortname(cmd.classname)
base = so.ObjectRef(
classname=sn.Name(module=nname.module, name=nname.name))
cmd.add(
sd.AlterObjectProperty(property='bases',
new_value=so.ObjectList([base])))
referrer_ctx = cls.get_referrer_context(context)
referrer_class = referrer_ctx.op.get_schema_metaclass()
referrer_name = referrer_ctx.op.classname
refdict = referrer_class.get_refdict_for_class(objcls)
cmd.add(
sd.AlterObjectProperty(
property=refdict.backref_attr,
new_value=so.ObjectRef(classname=referrer_name)))
if getattr(astnode, 'is_abstract', None):
cmd.add(
sd.AlterObjectProperty(property='is_abstract',
new_value=True))
return cmd
def visit_Argument(self, node, *, get_path_prefix):
op = ast.ops.EQ
name_parts = node.name
_, target = self._get_parent_and_current_type()
name = get_path_prefix()
name.append(qlast.Ptr(ptr=qlast.ObjectRef(name=name_parts)))
name = qlast.Path(steps=name)
value = self.visit(node.value)
# potentially need to cast the 'name' side into a <str>, so as
# to be compatible with the 'value'
typename = target.get_field_type(name_parts).short_name
if (typename != 'str' and gt.EDB_TO_GQL_SCALARS_MAP[typename]
in {GraphQLString, GraphQLID}):
name = qlast.TypeCast(
expr=name,
type=qlast.TypeName(maintype=qlast.ObjectRef(name='str')),
)
return qlast.BinOp(left=name, op=op, right=value)
def _classname_from_ast(cls, astnode, context, schema):
name = super()._classname_from_ast(astnode, context, schema)
parent_ctx = cls.get_referrer_context(context)
if parent_ctx is not None:
referrer_name = parent_ctx.op.classname
try:
base_ref = utils.ast_to_typeref(
qlast.TypeName(maintype=astnode.name),
modaliases=context.modaliases,
schema=schema)
except s_err.ItemNotFoundError:
base_name = sn.Name(name)
else:
base_name = base_ref.classname
pcls = cls.get_schema_metaclass()
pnn = pcls.get_specialized_name(base_name, referrer_name)
name = sn.Name(name=pnn, module=referrer_name.module)
return name
def reduce_TUPLE_LANGBRACKET_NamedTupleTypeList_RANGBRACKET(self, *kids):
self.val = qlast.TypeName(
maintype=qlast.ObjectRef(name='tuple'),
subtypes=kids[2].val,
)
def reduce_MAP_LANGBRACKET_TypeName_COMMA_TypeName_RANGBRACKET(
self, *kids):
self.val = qlast.TypeName(
maintype=qlast.ObjectRef(name='map'),
subtypes=[kids[2].val, kids[4].val],
)
def _normalize_view_ptr_expr(
shape_el: qlast.ShapeElement,
view_scls: s_nodes.Node,
*,
path_id: irast.PathId,
is_insert: bool = False,
is_update: bool = False,
view_rptr: typing.Optional[context.ViewRPtr] = None,
ctx: context.CompilerContext) -> s_pointers.Pointer:
steps = shape_el.expr.steps
is_linkprop = False
is_mutation = is_insert or is_update
# Pointers may be qualified by the explicit source
# class, which is equivalent to Expr[IS Type].
is_polymorphic = len(steps) == 2
scls = view_scls.peel_view()
ptrsource = scls
qlexpr = None
if is_polymorphic:
source = qlast.TypeFilter(expr=qlast.Path(steps=[qlast.Source()]),
type=qlast.TypeName(maintype=steps[0]))
lexpr = steps[1]
ptrsource = schemactx.get_schema_type(steps[0], ctx=ctx)
elif len(steps) == 1:
lexpr = steps[0]
is_linkprop = lexpr.type == 'property'
if is_linkprop:
if view_rptr is None:
raise errors.EdgeQLError(
'invalid reference to link property '
'in top level shape',
context=lexpr.context)
ptrsource = scls = view_rptr.ptrcls
source = qlast.Source()
else:
raise RuntimeError(
f'unexpected path length in view shape: {len(steps)}')
ptrname = (lexpr.ptr.module, lexpr.ptr.name)
ptrcls_is_derived = False
compexpr = shape_el.compexpr
if compexpr is None and is_insert and shape_el.elements:
# Nested insert short form:
# INSERT Foo { bar: Spam { name := 'name' }}
# Expand to:
# INSERT Foo { bar := (INSERT Spam { name := 'name' }) }
if lexpr.target is not None:
ptr_target = schemactx.get_schema_type(lexpr.target, ctx=ctx)
else:
ptr_target = None
base_ptrcls = ptrcls = setgen.resolve_ptr(
ptrsource,
ptrname,
s_pointers.PointerDirection.Outbound,
target=ptr_target,
ctx=ctx)
compexpr = qlast.InsertQuery(subject=qlast.Path(steps=[
qlast.ObjectRef(name=ptrcls.target.name.name,
module=ptrcls.target.name.module)
]),
shape=shape_el.elements)
if compexpr is None:
if lexpr.target is not None:
ptr_target = schemactx.get_schema_type(lexpr.target, ctx=ctx)
else:
ptr_target = None
base_ptrcls = ptrcls = setgen.resolve_ptr(
ptrsource,
ptrname,
s_pointers.PointerDirection.Outbound,
target=ptr_target,
ctx=ctx)
base_ptr_is_computable = ptrcls in ctx.source_map
if ptr_target is not None and ptr_target != base_ptrcls.target:
# This happens when a union type target is narrowed by an
# [IS Type] construct. Since the derived pointer will have
# the correct target, we don't need to do anything, but
# remove the [IS] qualifier to prevent recursion.
lexpr.target = None
else:
ptr_target = ptrcls.target
ptr_cardinality = ptrcls.cardinality
if shape_el.elements:
sub_view_rptr = context.ViewRPtr(view_scls,
ptrcls,
is_insert=is_insert,
is_update=is_update)
sub_path_id = path_id.extend(ptrcls, target=ptrcls.target)
ctx.path_scope.attach_path(sub_path_id)
if is_update:
for subel in shape_el.elements or []:
is_prop = (isinstance(subel.expr.steps[0], qlast.Ptr)
and subel.expr.steps[0].type == 'property')
if not is_prop:
raise errors.EdgeQLError(
'only references to link properties are allowed '
'in nested UPDATE shapes',
context=subel.context)
ptr_target = _process_view(scls=ptr_target,
path_id=sub_path_id,
view_rptr=sub_view_rptr,
elements=shape_el.elements,
is_update=True,
ctx=ctx)
else:
ptr_target = _process_view(scls=ptr_target,
path_id=sub_path_id,
view_rptr=sub_view_rptr,
elements=shape_el.elements,
ctx=ctx)
ptrcls = sub_view_rptr.derived_ptrcls
if ptrcls is None:
ptrcls_is_derived = False
ptrcls = sub_view_rptr.ptrcls
else:
ptrcls_is_derived = True
if (shape_el.where or shape_el.orderby or shape_el.offset
or shape_el.limit or base_ptr_is_computable or is_polymorphic):
if qlexpr is None:
qlexpr = qlast.Path(steps=[source, lexpr])
qlexpr = astutils.ensure_qlstmt(qlexpr)
qlexpr.where = shape_el.where
qlexpr.orderby = shape_el.orderby
qlexpr.offset = shape_el.offset
qlexpr.limit = shape_el.limit
else:
try:
base_ptrcls = ptrcls = setgen.resolve_ptr(
ptrsource,
ptrname,
s_pointers.PointerDirection.Outbound,
ctx=ctx)
except errors.EdgeQLReferenceError:
if is_mutation:
raise
ptr_module = (ptrname[0] or ctx.derived_target_module
or scls.name.module)
if is_linkprop:
ptr_metacls = s_props.Property
else:
ptr_metacls = s_links.Link
ptr_name = sn.SchemaName(module=ptr_module, name=ptrname[1])
base_ptrcls = ptrcls = ptr_metacls(name=ptr_name)
qlexpr = astutils.ensure_qlstmt(compexpr)
with ctx.newscope(fenced=True) as shape_expr_ctx:
# Put current pointer class in context, so
# that references to link properties in sub-SELECT
# can be resolved. This is necessary for proper
# evaluation of link properties on computable links,
# most importantly, in INSERT/UPDATE context.
shape_expr_ctx.view_rptr = context.ViewRPtr(view_scls,
ptrcls,
is_insert=is_insert,
is_update=is_update)
shape_expr_ctx.path_scope.unnest_fence = True
if is_mutation:
shape_expr_ctx.expr_exposed = True
irexpr = dispatch.compile(qlexpr, ctx=shape_expr_ctx)
irexpr.context = compexpr.context
derived_ptrcls = shape_expr_ctx.view_rptr.derived_ptrcls
if derived_ptrcls is not None:
ptrcls_is_derived = True
ptrcls = derived_ptrcls
inferred_cardinality = pathctx.infer_cardinality(irexpr, ctx=ctx)
if inferred_cardinality == irast.Cardinality.MANY:
ptr_cardinality = s_pointers.PointerCardinality.ManyToMany
else:
ptr_cardinality = s_pointers.PointerCardinality.ManyToOne
ptr_target = irutils.infer_type(irexpr, ctx.schema)
if ptr_target is None:
msg = 'cannot determine expression result type'
raise errors.EdgeQLError(msg, context=shape_el.context)
if is_mutation and not ptr_target.assignment_castable_to(
base_ptrcls.target, schema=ctx.schema):
# Validate that the insert/update expression is
# of the correct class.
lname = f'({ptrsource.name}).{ptrcls.shortname.name}'
expected = [repr(str(base_ptrcls.target.name))]
raise edgedb_error.InvalidPointerTargetError(
f'invalid target for link {str(lname)!r}: '
f'{str(ptr_target.name)!r} (expecting '
f'{" or ".join(expected)})')
if is_mutation and base_ptrcls.singular():
pathctx.enforce_singleton(irexpr, ctx=ctx)
if qlexpr is not None or ptr_target is not ptrcls.target:
if not ptrcls_is_derived:
if ptrcls.is_link_property():
rptrcls = view_rptr.derived_ptrcls
if rptrcls is None:
rptrcls = schemactx.derive_view(
view_rptr.ptrcls,
view_rptr.source,
view_scls,
is_insert=view_rptr.is_insert,
is_update=view_rptr.is_update,
ctx=ctx)
view_rptr.derived_ptrcls = rptrcls
src_scls = rptrcls
else:
src_scls = view_scls
ptrcls = schemactx.derive_view(ptrcls,
src_scls,
ptr_target,
is_insert=is_insert,
is_update=is_update,
derived_name_quals=[view_scls.name],
ctx=ctx)
if qlexpr is not None:
ctx.source_map[ptrcls] = (qlexpr, ctx)
ptrcls.computable = True
if not is_mutation:
ptrcls.cardinality = ptr_cardinality
if ptrcls.shortname == 'std::__type__' and qlexpr is not None:
msg = 'cannot assign to __type__'
raise errors.EdgeQLError(msg, context=shape_el.context)
return ptrcls
def reduce_ATTRIBUTE_ParenRawString_NL(self, *kids):
eql = kids[1].parse_as_attribute_decl()
self.val = esast.AttributeDeclaration(
name=eql.name.name,
extends=[qlast.TypeName(maintype=base) for base in eql.bases],
type=eql.type)