pgAdmin - When trying to make a foreign key "referencing" gives no options - postgresql

Question

I have three tables: ModelingAgency.clients, ModelingAgency.models, ModelingAgency.Bookings. All three tables have a primary key column called id.
The table bookings has two columns that reference clients and models. In pgAdmin when I try to create a foreign key in bookings to either clients or models I get the following screens:
What am I overlooking here? I am new to PostgreSQL (This is my first test project with PostgreSQL -- I've always used MySQL and occasionally SQL Server) so it's probably something obvious (I just don't see it).
EDIT: Here is the DDL, as requested:
-- Table: "ModelingAgency.bookings"
-- DROP TABLE "ModelingAgency.bookings";
CREATE TABLE "ModelingAgency.bookings"
(
id integer NOT NULL DEFAULT nextval('"ModelingAgency.Bookings_id_seq"'::regclass),
"clientId" integer NOT NULL,
"modelId" integer NOT NULL,
"time" timestamp with time zone NOT NULL DEFAULT now(),
"location" character varying(100) NOT NULL DEFAULT 'No Location Selected'::character varying,
CONSTRAINT "bookingId" PRIMARY KEY (id)
)
WITH (
OIDS=FALSE
);
ALTER TABLE "ModelingAgency.bookings" OWNER TO "MyBatisTutorial";
-- Table: "ModelingAgency.clients"
-- DROP TABLE "ModelingAgency.clients";
CREATE TABLE "ModelingAgency.clients"
(
id integer NOT NULL DEFAULT nextval('"ModelAgency.clients_id_seq"'::regclass),
"name" character varying(45) NOT NULL,
CONSTRAINT "clientId" PRIMARY KEY (id)
)
WITH (
OIDS=FALSE
);
ALTER TABLE "ModelingAgency.clients" OWNER TO "MyBatisTutorial";
-- Table: "ModelingAgency.models"
-- DROP TABLE "ModelingAgency.models";
CREATE TABLE "ModelingAgency.models"
(
id serial NOT NULL,
"name" character varying(45) NOT NULL,
CONSTRAINT "modelId" PRIMARY KEY (id)
)
WITH (
OIDS=FALSE
);
ALTER TABLE "ModelingAgency.models" OWNER TO "MyBatisTutorial";

Answer 1

Looking into your posted DDL code I see that your table's names are written in wrong way (that causes your issue with pgAdmin):
"ModelingAgency.bookings"
It should be in format "schema"."tableName":
"ModelingAgency"."bookings"
After that Object browser looks like this (probably you need to create schema first using easily pgAdmin or with CREATE SCHEMA SQL statement):
Here is working DDL code (I omitted some things like OIDS and OWNER TO, but that doesn't matter to your case, BTW OIDS are false on default):
DROP TABLE IF EXISTS "ModelingAgency"."bookings";
CREATE TABLE "ModelingAgency"."bookings"
(
id serial,
"clientId" integer NOT NULL,
"modelId" integer NOT NULL,
"time" timestamp with time zone NOT NULL DEFAULT now(),
"location" character varying(100) NOT NULL
DEFAULT 'No Location Selected'::character varying,
CONSTRAINT "bookingId" PRIMARY KEY (id)
);
DROP TABLE IF EXISTS "ModelingAgency"."clients";
CREATE TABLE "ModelingAgency"."clients"
(
id serial,
"name" character varying(45) NOT NULL,
CONSTRAINT "clientId" PRIMARY KEY (id)
);
DROP TABLE IF EXISTS "ModelingAgency"."models";
CREATE TABLE "ModelingAgency"."models"
(
id serial NOT NULL,
"name" character varying(45) NOT NULL,
CONSTRAINT "modelId" PRIMARY KEY (id)
)