neo4j-uploader 0.4.1

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Neo4j-uploader

For uploading specially formatted dictionary data to a Neo4j database instance.

Installation

pip install neo4j-uploader

Usage

In your application

from neo4j_uploader import upload

credentials = ("database_uri", "user", "password")
data = {
  "nodes":
  {
    "Person": [
      {"name": "Bob", "age": 30},
      {"name": "Jane", "age": 25}
    ]
  },
  "relationships":
  {
    "KNOWS": [
      {"_from_name": "Bob", "_to_name": "Jane", "since": 2015}
    ]
  }
}
upload(credentials, data, node_key="name)

Arguments

• credentials - A tuple of (database_uri, user, password)
• data - A dictionary of nodes and relationships to upload. See the Data Argument Format section for more details.
• node_key - The name of the key in the nodes dictionary that contains the node name. Defaults to "name"
• dedupe_nodes - If True, will not upload duplicate Nodes. Only updates existing with specified properties. Defaults to True
• dedupe_relationships - If True, will not created duplicate Relationships. Only updates existing with specified properties. Defaults to True
• should_overwrite - If True, will clear existing constraints, and will overwrite any existing Nodes and Relationships. Defaults to False.

Data Argument Format

Either a .json string or dictionary can be passed as an arg into the upload() function. This dictionary must have a key named nodes and optionally one named relationships

The value for the nodes key must be a dictionary, where each key is the primary node label for the node records to upload. The value of each is a list of dictionaries that represent node properties to upload.

The value for the relationships key must be a dictionary, where each key is relationship type. The value of each is a list of dictionaries that are the relationship properties to upload.

Every node record dictionary must have a unique key specified in the node_key argument. The default is _uid if none is provided. Relationships must have both _from_<node_key> and _to_<node_key> key-values to determine which Nodes a Relationship should connect. By default these would need to be _from__uid and _to__uid if a node_key is not provided to the upload() function.

Example .json using a custom node_key:

{
    "node_key": "nid",
    "nodes": {
      "Person": [
        {
          "first_name": "Jaclyn",
          "last_name": "Stacey",
          "nid": "b267e10d-998b-4804-b5a5-fe84b9ee982a"
        },
        {
          "first_name": "Ryan",
          "last_name": "Adam",
          "nid": "0053fd25-71e4-40c1-80ff-f6b7e4211c77"
        }
      ]
    },
    "relationships": {
      "LIVES_WITH": [
        {
          "_from_nid": "b267e10d-998b-4804-b5a5-fe84b9ee982a",
          "_to_nid": "0053fd25-71e4-40c1-80ff-f6b7e4211c77",
          "since" : "2018-02-01"
        }
      ]
    }
  }