How to properly resolve query MySql using sequelize and Graphql - mysql

Question

I am learning GraphQL and trying to get data from MySql tables via sequelize in the resolve function on GraphQL. I have a Clients table associated with a Pets Table, where Pets belong to Client.
Here is my code:
const PetsType = new GraphQLObjectType({
name: "Pet",
fields: () => ({
id: { type: GraphQLString },
name: { type: GraphQLString },
breed: { type: GraphQLString },
type: { type: GraphQLString },
ClientId: { type: GraphQLString },
Comments: {
type: CommentsType,
resolve(parentValue, args) {
return db.Comments;
}
}
})
});
const ClientType = new GraphQLObjectType({
name: "Client",
fields: () => ({
id: { type: GraphQLString },
lastName: { type: GraphQLString },
firstName: { type: GraphQLString },
primaryPhoneNumber: { type: GraphQLString },
cellphone: { type: GraphQLString },
workPhone: { type: GraphQLString },
email: { type: GraphQLString },
Pets: {
type: PetsType,
resolve(parentValue, args) {
return db.Pet.findOne({
where: { ClientId: parentValue.id }
});
}
}
})
});
Using findOne works for clients with only one pet or only returns the first pet of a client who owns more than one. However, some clients have more than one pet, so findOne() doesn't really solve my problem.
I've tried:
return db.Pet.findAll({
where: { ClientId: parentValue.id }
});
But it returns the client with the fields on Pets null.
Here are my Sequelize models for both, Clients and Pets:
Clients:
module.exports = function(sequelize, DataTypes) {
var Client = sequelize.define(
"Client",
{
lastName: {
type: DataTypes.TEXT,
allowNull: false,
len: [1]
},
firstName: {
type: DataTypes.TEXT,
allowNull: false,
len: [1]
},
primaryPhoneNumber: {
type: DataTypes.TEXT,
allowNull: true,
len: [1]
},
cellphone: {
type: DataTypes.TEXT,
allowNull: true,
len: [1]
},
workPhone: {
type: DataTypes.TEXT,
allowNull: true,
len: [1]
},
email: {
type: DataTypes.TEXT,
allowNull: true,
len: [1]
}
},
{
timestamps: false
}
);
Client.associate = function(models) {
// Associating Clients with Pets
// When a Client is deleted, also delete any associated Pets
Client.belongsTo(models.User);
Client.hasMany(models.Pet, {
onDelete: "cascade"
});
};
return Client;
};
Pets:
module.exports = function(sequelize, DataTypes) {
var Pet = sequelize.define(
"Pet",
{
name: {
type: DataTypes.TEXT,
allowNull: false,
len: [1]
},
breed: {
type: DataTypes.TEXT,
allowNull: false,
len: [1]
},
type: {
type: DataTypes.TEXT,
allowNull: true
}
},
{
timestamps: false
}
);
Pet.associate = function(models) {
Pet.belongsTo(models.Client);
Pet.hasMany(models.Comment, {
onDelete: "cascade"
});
};
return Pet;
};
How can I retreive all Pets that belong to this client?
Thanks in advance.

Answer 1

As Daniel Rearden suggested, I changed it to: type: new GraphQLList(PetsType) to return a list of objects