[feat] Added backwards compatibility for OllamaEmbeddings initialization (migration from langchain_community.embeddings to langchain_ollama.embeddings

[SyedBaqarAbbas]

• [feat] Added backwards compatibility for OllamaEmbeddings initialization (migration from langchain_community.embeddings to langchain_ollama.embeddings: "langchain_ollama"
  • Description: Given that OllamaEmbeddings from langchain_community.embeddings is deprecated, code is being shifted to ``langchain_ollama.embeddings. However, this does not offer backward compatibility of initializing the parameters and OllamaEmbeddings` object.
  • Issue: Missing options in OllamaEmbeddings of langchain_ollama.embeddings after migration from langchain_community.embeddings #29294
  • Dependencies: None
  • Twitter handle: @BaqarAbbas2001

Additional Information

Previously, OllamaEmbeddings from langchain_community.embeddings used to support the following options:

langchain/libs/community/langchain_community/embeddings/ollama.py

Lines 125 to 139 in e9abe58

	"options": {
	"mirostat": self.mirostat,
	"mirostat_eta": self.mirostat_eta,
	"mirostat_tau": self.mirostat_tau,
	"num_ctx": self.num_ctx,
	"num_gpu": self.num_gpu,
	"num_thread": self.num_thread,
	"repeat_last_n": self.repeat_last_n,
	"repeat_penalty": self.repeat_penalty,
	"temperature": self.temperature,
	"stop": self.stop,
	"tfs_z": self.tfs_z,
	"top_k": self.top_k,
	"top_p": self.top_p,
	},

However, in the new package from langchain_ollama import OllamaEmbeddings, there is no method to set these options. I have added these parameters to resolve this issue.

This issue was also discussed in #29113

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