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fullstack-tutorial | fullstack tutorial 2021,后台技术栈/架构师之路/全栈开发社区,春招/秋招/校招/面试 | Learning library

 by   frank-lam Java Version: Current License: No License

 by   frank-lam Java Version: Current License: No License

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kandi X-RAY | fullstack-tutorial Summary

fullstack-tutorial is a Java library typically used in Tutorial, Learning, Example Codes applications. fullstack-tutorial has no bugs, it has no vulnerabilities and it has medium support. However fullstack-tutorial build file is not available. You can download it from GitHub.
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kandi-support Support

  • fullstack-tutorial has a medium active ecosystem.
  • It has 10023 star(s) with 2279 fork(s). There are 369 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 15 open issues and 18 have been closed. On average issues are closed in 33 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of fullstack-tutorial is current.
fullstack-tutorial Support
Best in #Learning
Average in #Learning
fullstack-tutorial Support
Best in #Learning
Average in #Learning

quality kandi Quality

  • fullstack-tutorial has 0 bugs and 12 code smells.
fullstack-tutorial Quality
Best in #Learning
Average in #Learning
fullstack-tutorial Quality
Best in #Learning
Average in #Learning

securitySecurity

  • fullstack-tutorial has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • fullstack-tutorial code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
fullstack-tutorial Security
Best in #Learning
Average in #Learning
fullstack-tutorial Security
Best in #Learning
Average in #Learning

license License

  • fullstack-tutorial does not have a standard license declared.
  • Check the repository for any license declaration and review the terms closely.
  • Without a license, all rights are reserved, and you cannot use the library in your applications.
fullstack-tutorial License
Best in #Learning
Average in #Learning
fullstack-tutorial License
Best in #Learning
Average in #Learning

buildReuse

  • fullstack-tutorial releases are not available. You will need to build from source code and install.
  • fullstack-tutorial has no build file. You will be need to create the build yourself to build the component from source.
  • fullstack-tutorial saves you 556 person hours of effort in developing the same functionality from scratch.
  • It has 1301 lines of code, 0 functions and 8 files.
  • It has low code complexity. Code complexity directly impacts maintainability of the code.
fullstack-tutorial Reuse
Best in #Learning
Average in #Learning
fullstack-tutorial Reuse
Best in #Learning
Average in #Learning
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fullstack-tutorial Key Features

🚀 fullstack tutorial 2021,后台技术栈/架构师之路/全栈开发社区,春招/秋招/校招/面试

Should a query in Apollo Client look for the results cached by different queries before making a network request?

copy iconCopydownload iconDownload
todo(id: $id) {
  title
  completed
} 
try {
  return client.readFragment({
    id: 'Todo:5', // The value of the to-do item's unique identifier
    fragment: gql`
      fragment TodoFragment on Todo {
      id
      title
      completed 
    }
    `,
  });
} catch(_e) { // if no fragment is found there will be an error
  client.query(QUERY, variables: { id: 5})
}
todos {
  id
  title
  completed
}
todo(id: $id) {
  id
  title
  completed
} 
-----------------------
todo(id: $id) {
  title
  completed
} 
try {
  return client.readFragment({
    id: 'Todo:5', // The value of the to-do item's unique identifier
    fragment: gql`
      fragment TodoFragment on Todo {
      id
      title
      completed 
    }
    `,
  });
} catch(_e) { // if no fragment is found there will be an error
  client.query(QUERY, variables: { id: 5})
}
todos {
  id
  title
  completed
}
todo(id: $id) {
  id
  title
  completed
} 
-----------------------
todo(id: $id) {
  title
  completed
} 
try {
  return client.readFragment({
    id: 'Todo:5', // The value of the to-do item's unique identifier
    fragment: gql`
      fragment TodoFragment on Todo {
      id
      title
      completed 
    }
    `,
  });
} catch(_e) { // if no fragment is found there will be an error
  client.query(QUERY, variables: { id: 5})
}
todos {
  id
  title
  completed
}
todo(id: $id) {
  id
  title
  completed
} 
-----------------------
todo(id: $id) {
  title
  completed
} 
try {
  return client.readFragment({
    id: 'Todo:5', // The value of the to-do item's unique identifier
    fragment: gql`
      fragment TodoFragment on Todo {
      id
      title
      completed 
    }
    `,
  });
} catch(_e) { // if no fragment is found there will be an error
  client.query(QUERY, variables: { id: 5})
}
todos {
  id
  title
  completed
}
todo(id: $id) {
  id
  title
  completed
} 

Apollo - endpoint http not found in root project

copy iconCopydownload iconDownload
mkdir -p app/src/main/graphql/com/bangenergy/ ./gradlew :app:downloadApolloSchema -P com.apollographql.apollo.endpoint='http://localhost:4000/graphql/' -P com.apollographql.apollo.schema='src/main/graphql/com/bangenergy/schema.json'
-----------------------
gradlew :app:downloadApolloSchema --endpoint="http://****REPLACE_WITH_YOUR_ENDPOINT/graphql/" --schema="src/main/graphql/com/example/programbuilder/schema.json"

Apollo GraphQL tutorial: "GraphQLError: Cannot query field \"id\" on type \"LaunchConnection\"."

copy iconCopydownload iconDownload
type LaunchConnection {
  cursor: String!
  hasMore: Boolean!
  launches: [Launch]!
}

type Query {
  launches: LaunchConnection!
}
query GetLaunches {
  launches {
    id
    mission {
      name
    }
  }
}
query GetLaunches {
    launches {
        launches {
            id
            mission {
                name
            }
        }
    }
}
-----------------------
type LaunchConnection {
  cursor: String!
  hasMore: Boolean!
  launches: [Launch]!
}

type Query {
  launches: LaunchConnection!
}
query GetLaunches {
  launches {
    id
    mission {
      name
    }
  }
}
query GetLaunches {
    launches {
        launches {
            id
            mission {
                name
            }
        }
    }
}
-----------------------
type LaunchConnection {
  cursor: String!
  hasMore: Boolean!
  launches: [Launch]!
}

type Query {
  launches: LaunchConnection!
}
query GetLaunches {
  launches {
    id
    mission {
      name
    }
  }
}
query GetLaunches {
    launches {
        launches {
            id
            mission {
                name
            }
        }
    }
}

Community Discussions

Trending Discussions on fullstack-tutorial
  • Should a query in Apollo Client look for the results cached by different queries before making a network request?
  • Apollo - endpoint http not found in root project
  • Apollo GraphQL tutorial: "GraphQLError: Cannot query field \"id\" on type \"LaunchConnection\"."
Trending Discussions on fullstack-tutorial

QUESTION

Should a query in Apollo Client look for the results cached by different queries before making a network request?

Asked 2020-Nov-23 at 17:57

I'm trying to figure out how queries in Apollo Client are supposed to interact with the cache.

Specifically, I want to know if we run a query that fetches all todos:

todos {
  title
  completed
}

And then later we run a query that fetches a single todo that was already fetched by the todos query and requests the exact same fields:

todo(id: $id) {
  title
  completed
} 

Should the second query a) fetch the data from the cache, or b) make a network request?

My assumption was that it would be case A. This is based on this quote from an official Apollo blog post:

https://www.apollographql.com/blog/demystifying-cache-normalization/

For example, if we were to:

  1. Perform a GetAllTodos query, normalizing and caching all todos from a backend
  2. Call GetTodoById on a todo that we had already retrieved with GetAllTodos

...then Apollo Client could just reach into the cache and get the object directly without making another request.

However, in my app I kept getting case B, it was always making an additional network request even though I had already requested all the data in a different query.

I assumed that I was doing something wrong, so I checked out this Apollo Full-stack Tutorial repo (https://github.com/apollographql/fullstack-tutorial) and updated the LaunchDetails query to only request the same data that was already requested in the GetLaunchList query. This replicated the same scenario I detailed above with the todos.

The queries now look like this:

export const GET_LAUNCHES = gql`
  query GetLaunchList($after: String) {
    launches(after: $after) {
      cursor
      hasMore
      launches {
        ...LaunchTile
      }
    }
  }
  ${LAUNCH_TILE_DATA}
`;
export const GET_LAUNCH_DETAILS = gql`
  query LaunchDetails($launchId: ID!) {
    launch(id: $launchId) {
      ...LaunchTile
    }
  }
  ${LAUNCH_TILE_DATA}
`;

I ran the application, and found that a new network request was made for the LaunchDetails query, even though all the required data was already in the cache after the GetLaunchList query was run.

I haven't been able to find any answer to this in the documentation, and the results I'm seeing from the example tutorial app seem to be at odds with the quote from the blog piece above.

Is it the case that a query will only look to the cache if the query has already been run before? Can it not fetch cached data if that data was cached by a different query? Am I missing something?

ANSWER

Answered 2020-Nov-23 at 17:57

the query will make a network query.

todo(id: $id) {
  title
  completed
} 

Apollo cache isn't very smart. It is just storage. You need to read/write for more complicated operations manually.

The reason for this is Apollo doesn't know about your schema and data structure. It doesn't know that todo(id: $id) will do DB search by, so it can't optimize to look in the cache.

If you don't want a second fetch, you have to implement your data fetch structure with fragment:

try {
  return client.readFragment({
    id: 'Todo:5', // The value of the to-do item's unique identifier
    fragment: gql`
      fragment TodoFragment on Todo {
      id
      title
      completed 
    }
    `,
  });
} catch(_e) { // if no fragment is found there will be an error
  client.query(QUERY, variables: { id: 5})
}

The way Apollo cache is that if you do two queries:

  1. load todos
todos {
  id
  title
  completed
}
  1. load single todo
todo(id: $id) {
  id
  title
  completed
} 

If you list a list of todos and load the second one - it will update the todo data.

Source https://stackoverflow.com/questions/64787887

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install fullstack-tutorial

You can download it from GitHub.
You can use fullstack-tutorial like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the fullstack-tutorial component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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